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Synergy effect of multi-strengthening mechanisms in FeMnCoCrN HEA at cryogenic temperature

Journal of Materials Science & Technology 2021年第27期86卷 158-170页

作者： Zhufeng He Nan Jia Hongwei Wang haile yan Yongfeng Shen Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China State Key Lab Rolling&Automat Northeastern UniversityShenyang 110819China

High-entropy alloys(HEAs)have attracted great research interest owing to their good combination of high strength and ductility at both room and cryogenic ***,expensive raw materials are always added to overcome the strength-ductility trade-off at low temperatures,leading to an increased production cost for the cryogenically used *** this work,a series of nitrogen-doped Fe Mn Co Cr HEAs have been processed by homogenization annealing,cold rolling and recrystallization annealing followed by water *** microstructural evolution and mechanical properties of the alloys are studied *** Fe_(49)Mn_(30)Co_(10)Cr_(10)N1alloy shows excellent mechanical properties at both 293 K and 77 ***,the yield and ultimate tensile strength of 1078 and 1630 MPa are achieved at the cryogenic temperature,respectively,while a satisfactory uniform elongation of 33.5%is *** ultrahigh yield strength results from the microstructure refinement caused by the activation of athermal martensitic transformation and mechanical twinning that occur in the elastic regime together with the increased lattice friction due to the cryogenic *** the plastic regime,the dynamic Hall-Petch effect caused by twinning,martensitic transformation,and reverse transformation together with the high barrier to dislocation motion jointly contribute to the ultrahigh tensile ***,the transformation induced plasticity(TRIP)and the twinning induced plasticity(TWIP)effects jointly contribute to the *** design strategy for attaining superior mechanical properties at low temperatures,*** adjusting stacking fault energy in the interstitial metastable HEAs,guides the development of high-performance and low-cost alloys for cryogenic applications.

关键词： High-entropy alloy Cryogenic deformation Nitrogen doping Phase transformation Twinning

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Influence of Shear Banding on the Formation of Brass-type Textures in Polycrystalline fcc Metals with Low Stacking Fault Energy

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Journal of Materials Science & Technology 2014年第4期30卷 408-416页

作者： haile yan Xiang Zhao Nan Jia Yiran Zheng Tong He Key Laboratory for Anisotropy and Texture of Materials(MOE) Northeastern University Northeastern University Research Academy

Texture evolution in nickel, copper and α-brass that are representative of face-centered-cubic （fcc） materials with different stacking fault energy （SFE） during cold rolling was systematically investigated. X-ray diffraction, scanning electron microscopy and electron backscatter diffraction techniques were employed to characterize microstructures and local orientation distributions of specimens at different thickness reductions. Besides, Taylor and Schmid factors of the {111} 〈110〉 slip systems and {111} 〈112〉 twin systems for some typical orientations were utilized to explore the relationship between texture evolution and deformation microstructures. It was found that in fcc metals with low SFE at large deformations, the copper-oriented grains rotated around the 〈110〉 crystallographic axis through the brass-R orientation to the Goss orientation, and finally toward the brass orientation. The initiation of shear banding was the dominant mechanism for the above-mentioned texture transition.

关键词： Face-centered-cubic ahoy Texture Rolling Shear band

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Electromagnetic wave absorption performance of Ti_(2)O_(3)and vacancy enhancement effective bandwidth

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Journal of Materials Science & Technology 2021年第17期76卷 166-173页

作者： Xiankai Fu Bo yang Wanqi Chen Zongbin Li haile yan Xiang Zhao Liang Zuo Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and Engineering.Northeastern UniversityShenyang110819China

The microwave absorption properties of Ti_(2)O_(3)were systematically *** results indicate that Ti_(2)O_(3)has microwave absorption performance with a minimum reflection loss value of-37.6 d B at 18.6 GHz and an effective absorption bandwidth(RL<-10 d B)of 2 ***,vacancy defects were introduced into Ti_(2)O_(3)by carbothermal ***,the effective absorption bandwidth of Ti_(2)O_(3)with vacancy defects reach 3.2 ***-principles calculations provide evidence that vacancy defects result in the changes of electric dipole state,leading to a wider effective absorption *** results have significance in understanding the origin of electromagnetic phenomena and developing electromagnetic wave absorption materials.

关键词： Ti_(2)O_(3) Microwave absorption Vacancy Electric dipoles First-principles

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Probing martensitic transformation,kinetics,elastic and magnetic properties of Ni2-xMn1.5In0.5Cox alloys

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Journal of Materials Science & Technology 2020年第9期44卷 31-41页

作者： Xinzeng Liang Jing Bai Jianglong Gu haile yan Yudong Zhang Claude Esling Xiang Zhao Liang Zuo Key Laboratory for Anisotropy and Texture of Materials Northeastern UniversityShenyang110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao066004China Hebei Provincial Laboratory for Dielectric and Electrolyte Functional Materials Qinhuangdao066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China Laboratoire d’étude des Microstructures et de Mécanique des Matériaux LEM3 CNRSUMR 7239University of Lorraine57045MetzFrance

The martensitic transformation,kinetics,elastic and magnetic properties of the Ni2-xMn1.5In0.5Cox(x=0-0.33)ferromagnetic shape memory alloys were investigated experimentally and theoretically by first-principles ***-principles calculations show that Co directly occupies the site of Ni sublattice,and Co atoms prefer to distribute evenly in the *** optimized lattice constants are consistent with the experimental *** martensitic transformation paths are as follows:PA↔FA↔6MFIM↔NMFIM when 0≤x<0.25;PA↔FA↔6MFM↔NMFIM with 0.25≤x<0.3 and PA↔FA↔NMFM with 0.3≤x≤0.33 for Ni2-xMn1.5In0.5Cox(x=0-0.33)*** fundamental reasons for the decrease of TM with increasing Co content are explained from the aspects of first-principles calculations and martensitic transformation *** component interval of the magnetostructural coupling is determined as 0≤x≤0.25 by first-principles ***,the origin of the demagnetization effect during martensitic transformation is attributed to the shortening of the nearest neighboring distances for Ni-Ni(Co)and *** the theoretical calculations with experimental results,it is verified that the TM of the Co6 alloy is near room temperature and its magnetization differenceM is 94.6 emu/***,magnetic materials with high performance can be obtained,which may be useful for new magnetic applications.

关键词： Ni-Mn-In-Co First-principles calculations Martensitic transformation Kinetics Elastic and magnetic property

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Investigation of martensitic transformation behavior in Ni-Mn-In Heusler alloy from a first-principles study

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Journal of Materials Science & Technology 2020年第23期58卷 100-106页

作者： Jinlong Wang Jing Bai Jianglong Gu haile yan Yudong Zhang Claude Esling Xiang Zhao Liang Zuo Key Laboratory for Anisotropy and Texture of Materials Northeastern UniversityShenyang110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China Laboratoire d’Étude des Microstructures et de Mécanique des Matériaux LEM3CNRSUMR 7239University of Lorraine57045MetzFrance Hebei Provincial Laboratory for Dielectric and Electrolyte Functional Materials Qinhuangdao066004China

Composition dependence of martensitic transformations as well as the magnetic properties for the Ni_2 Mn_(1+x)In_(1-x)(0.25≤x≤0.58)alloys were investigated by using the first-principles *** results demonstrate that the stability of parent austenite(A)decreases gradually with increasing Mn content whilst it is opposite for the martensitic *** causes the total energy difference between the austenite and martensite phases increscent with increasing Mn *** x=0.33,the martensite transformation during cooling is PA→FA→*** x≥0.42,an intermartensitic transformation occurs from modulated 6 M martensite to non-modulated(NM)martensite with the martensite transformation sequence of PA→FA→6 M→*** martensitic transformation from austenite to martensite accompanies the transition from ferromagnetic to ferrimagnetic *** is a typical magneto-structural coupling *** analysis of the density of states demonstrates that the Ni 3 d state plays an important role in the phase stability.

关键词： Ni-Mn-In Shape memory alloy Martensitic transformation Magnetic properties First-principles calculations

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Revealing the role of site occupation in phase stability,magnetic and electronic properties of Ni-Mn-In alloys by ab initio approach

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Journal of Materials Science & Technology 2021年第24期83卷 90-101页

作者： Xinzeng Liang Jing Bai Ziqi Guan Jianglong Gu haile yan Yudong Zhang Claude Esling Xiang Zhao Liang Zuo Key Laboratory for Anisotropy and Texture of Materials Northeastern UniversityShenyang110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao066004China Laboratoire d'Étude des Microstructures et de Mécanique des Matériaux LEM3 CNRSUMR 7239University of Lorraine57045MetzFrance

The effects of site occupation on the phase stability,martensitic transformation,and the magnetic and electronic properties of a full series of Ni-Mn-In alloys are theoretically studied by using the ab initio *** indicate that the excess atoms of the rich component directly take the sublattices of the deficient components of the Ni2Mn_(1+x)In_(1-x),Ni2-xMn_(1+x)In,and Ni_(2+x)Mn_(1-x)In ***,the mixed and indirect site occupations may coexist in the Ni_(2+x)Mn In_(1-x)*** relevant magnetic configurations of the austenite for the four alloy systems have also been *** results show that,except for the austenite in the Ni2-xMn_(1+x)In alloys,which tend to be ferrimagnetic,the other alloys all present ferromagnetic ***,the site occupation and associated magnetic states are the crucial influencing factors of the phase stability,martensitic transformation,and the total magnetic *** electronic structure of the austenite phase also shows that the covalent bonding plays an important role in the phase *** key finding of this work is both Ni2Mn_(1+x)In_(1-x)and Ni_(2+x)Mn In_(1-x)alloys serve as the potential shape memory alloys.

关键词： Ni-Mn-In Ab initio calculations Site occupation Phase stability Magnetic property

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Composition-Dependent of 6 M Martensite Structure and Magnetism in Cu-Alloyed Ni-Mn-In-Co by First-Principles Calculations

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Acta Metallurgica Sinica(English Letters) 2022年第6期35卷 1034-1042页

作者： Xinzeng Liang Jing Bai Jianglong Gu Ziqi Guan haile yan Yudong Zhang Claude Esling Xiang Zhao Liang Zuo Key Laboratory for Anisotropy and Texture of Materials Northeastern University110819 ShenyangChina School of Resources and Materials Northeastern University At Qinhuangdao066004 QinhuangdaoChina State Key Laboratory of Metastable Materials Science and Technology Yanshan University066004 QinhuangdaoChina Hebei Provincial Laboratory for Dielectric and Electrolyte Functional Materials 066004 QinhuangdaoChina Laboratoire D’étude Des Microstructures Et de Mécanique Des Matériaux UMR 7239LEM3 CNRSUniversity of Lorraine57045 MetzFrance

The composition dependence of the crystal structure and magnetism of the 6 M martensite for the Cu-doped Ni_(43.75)Mn_(37.5)In_(12.5)Co_(6.25) alloy at different site occupations(Cu substitution for Ni, Mn, In, and Co, respectively) is investigated in detail with the first-principles calculations. Results show that the austenite(A) phase exhibits a ferromagnetic(FM) state in all occupation manners, the 6 M martensite possesses an FM state except for the case of Cu substitution at the normal Mn(Mn1) site, and the non-modulated(NM) martensite displays a ferrimagnetic(FIM) state apart from the Cu substitution at the Ni, Mn1, or In sites. The Cu atom destabilizes the A, 6 M, and NM phases regardless of the occupation manner. The one-step martensitic transformation from the A to NM phase occurs in the case of Cu substituting for Mn1, excess Mn(Mn2), or Co;for Cu substituting Ni, a martensitic transformation including 6 M martensite happens, i.e., A → 6 M → NM;however, the martensitic transformation disappears when Cu replaces In site. From the equilibrium lattice constants, it can be speculated that the substitution of Cu for Ni can effectively reduce the thermal hysteresis( ΔT_(Hys)). The magnetic properties are found to be greatly reduced by the substitution of the non-magnetic element Cu for the ferromagnetic Mn atom, whereas the effect is fewer in the remaining cases. It is predicted that the alloy has more favorable properties when Cu replaces Ni. The present results can lay a theoretical foundation for further development of multielement magnetic shape memory alloys.

关键词： First-principles calculations Ni-Mn-In-Co-Cu 6 M martensite Phase stability Magnetic property

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Impact of W alloying on microstructure, mechanical property and corrosion resistance of face-centered cubic high entropy alloys: A review

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International Journal of Minerals,Metallurgy and Materials 2023年第9期30卷 1667-1679页

作者： Na Xiao Xu Guan Dong Wang haile yan Minghui Cai Nan Jia Yudong Zhang Claude Esling Xiang Zhao Liang Zuo Analytical and Testing Center Northeastern UniversityShenyang 110819China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China College of Mechanical Engineering Zhijiang College of Zhejiang University of TechnologyShaoxing 312030China Laboratoire d'Étude des Microstructures et de Mécanique des Matériaux(LEM3) CNRS UMR 7239Universitéde Lorraine57045 MetzFrance Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures(DAMAS) Universitéde Lorraine57045 MetzFrance

Face-centered cubic (f.c.c.) high entropy alloys (HEAs) are attracting more and more attention owing to their excellent strength and ductility synergy, irradiation resistance, etc. However, the yield strength of f.c.c. HEAs is generally low, significantly limiting their practical applications. Recently, the alloying of W has been evidenced to be able to remarkably improve the mechanical properties of f.c.c. HEAs and is becoming a hot topic in the community of HEAs. To date, when W is introduced, multiple strengthening mechanisms, including solid-solution strengthening, precipitation strengthening (μphase,σphase, and b.c.c. phase), and grain-refinement strengthening, have been discovered to be activated or enhanced. Apart from mechanical properties, the addition of W improves corrosion resistance as W helps to form a dense WO_(3) film on the alloy surface. Until now, despite the extensive studies in the literature, there is no available review paper focusing on the W doping of the f.c.c. HEAs. In that context, the effects of W doping on f.c.c. HEAs were reviewed in this work from three aspects, i.e., microstructure,mechanical property, and corrosion resistance. We expect this work can advance the application of the W alloying strategy in the f.c.c. HEAs.

关键词： high-entropy alloys lattice distortion W doping mechanical property precipitation

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Observation of magnetic domain evolution in constrained epitaxial Ni–Mn–Ga thin films on MgO(0 0 1) substrate

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Journal of Materials Science & Technology 2022年第7期102卷 56-65页

作者： Bo yang Ivan Soldatov Fenghua Chen Yudong Zhang Zongbin Li haile yan Rudolf Schäfer Dunhui Wang Claude Esling Xiang Zhao Liang Zuo Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China Institute for Metallic Materials Leibniz Institute for Solid State and Materials Research(IFW)DresdenHelmholtzstrasse 2001069 DresdenGermany Institute of Natural Sciences Ural Federal University620002 EkaterinburgRussia Department of Physics School of Applied ScienceTaiyuan University of Science and TechnologyTaiyuan 030024China Laboratoire d’Étude des Microstructures et de Mécanique des Matériaux(LEM3) CNRS UMR 7239Universitéde Lorraine57045 MetzFrance Institute for Materials Science Dresden University of Technology01062 DresdenGermany National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nanotechnology and Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Epitaxial Ni–Mn–Ga thin films have promising application potential in micro-electro-mechanical sensing and actuation systems. To date, large abrupt magnetization changes have been observed in some epitaxial Ni–Mn–Ga thin films, but their origin-either from magnetically induced martensite variant reorientation(MIR) or magnetic domain evolution-has been discussed controversially. In the present work, we investigated the evolutions of the magnetic domain and microstructure of a typical epitaxial Ni–Mn–Ga thin film through wide-field magneto-optical Kerr-microscopy. It is demonstrated that the abrupt magnetization changes in the hysteresis loops should be attributed to the magnetic domain evolution instead of the MIR.

关键词： Ni–Mn–Ga thin films Magnetic field-induced variant reorientation Magnetic domains Magnetization process Magneto-optical Kerr microscopy

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Towards ultrastrong and ductile medium-entropy alloy through dual-phase ultrafine-grained architecture

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Journal of Materials Science & Technology 2022年第31期126卷 228-236页

作者： Zhen Chen Hongbo Xie haile yan Xueyong Pang Yuhui Wang Guilin Wu Lijun Zhang Hu Tang Bo Gao Bo yang yanzhong Tian Huiyang Gou Gaowu Qin Center for High Pressure Science&Technology Advanced Research(Beijing) Beijing 100094China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao 066004China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China School of Materials and Engineering Shandong University of Science and TechnologyQingdao 266590China Instrumental Analysis Center Taiyuan University of Science and TechnologyTaiyuan 030024China

Advanced materials with superior comprehensive mechanical properties are strongly desired,but it has long been a challenge to achieve high ductility in high-strength ***,we proposed a new V 0.5 Cr 0.5 CoNi medium-entropy alloy(MEA)with a face-centered cubic/hexagonal close-packed(FCC/HCP)dual-phase ultrafine-grained(UFG)architecture containing stacking faults(SFs)and local chemical order(LCO)in HCP solid solution,to obtain an ultrahigh yield strength of 1476 MPa and uniform elongation of 13.2%at ambient *** ultrahigh yield strength originates mainly from fine grain strength-ening of the UFG FCC matrix and HCP second-phase strengthening assisted by the SFs and LCO inside,whereas the large ductility correlates to the superior ability of the UFG FCC matrix to storage disloca-tions and the function of deformation-induced SFs in the vicinity of the FCC/HCP boundary to eliminate the stress *** work provides new guidance by engineering novel composition and stable UFG structure for upgrading the mechanical properties of metallic materials.

关键词： Medium-entropy alloy FCC/HCP dual-phase Strength and ductility Ultrafine-grained(UFG) Multiple hardening mechanisms

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