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Journal of Central South University 2024年第6期31卷 1774-1789页

作者： ZHANG Jin-hai nie kai-bo ZHANG Jin-hua DENG Kun-kun LIU Zhi-long College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Key Laboratory of High-end Compressor and System Technology Hefei 230031China

In this study,the Mg-3Zn-0.5Zr-χNd(χ=0,0.6)alloys were subjected to final rolling treatment with large deformation of 50%.The impact of annealing temperatures on the microstructure and mechanical properties was *** rolled Mg-3Zn-0.5Zr-0.6Nd alloy exhibited an ultimate tensile strength of 386 MPa,a yield strength of 361 MPa,and an elongation of 7.1%.Annealing at different temperatures resulted in reduced strength and obviously increased elongation for both *** mechanical properties for the Mg-3Zn-0.5Zr-0.6Nd alloy were achieved after annealing at 200℃,with an ultimate tensile strength of 287 MPa,a yield strength of 235 MPa,and an elongation of 26.1%.The numerous deformed microstructures,twins,and precipitated phases in the rolled alloy could impede the deformation at room temperature and increase the work hardening *** annealing,a decrease in the work hardening effect and an increase in the dynamic recovery effect were obtained due to the formation of fine equiaxed grains,and the increased volume fraction of precipitated phases,which significantly improved the elongation of the ***,the addition of Nd element could enhance the annealing recrystallization rate,reduce the Schmid factor difference between basal and prismatic slip systems,facilitate multi-system slip initiation and improve the alloy plasticity.

关键词： Mg-Zn-Zr-Nd alloy large final rolling deformation annealing temperatures microstructures mechanical properties

Hot extrusion of SiC_p/AZ91 Mg matrix composites

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Transactions of Nonferrous Metals Society of China 2012年第8期22卷 1912-1917页

作者：王晓军胡小石聂凯波吴昆郑明毅哈尔滨工业大学材料科学与工程学院哈尔滨150001

SiC particles reinforced AZ91 Mg matrix composites （SiCp/AZ91） with SiC volume fractions of 5%, 10% and 15% were fabricated by stir casting. After T4 treatment, these composites were extruded at 350 °C with an extrusion ratio of 12：1. In the as-cast composite, particles segregated at a microscopic scale within the intergranular regions. Hot extrusion almost eliminated this particle aggregation and improved the particle distribution of the composites. In addition, extrusion refined the grains of matrix. The results show that hot extrusion significantly improves the mechanical properties of the composites. In the as-extruded composite, with the increase of SiCp contents, the grain size of the extruded composites decreases, the strength and elastic modulus increase but the elongation decreases.

关键词： extrusion Mg matrix composites SiCp AZ91 magnesium alloy volume fraction

锻造+挤压复合变形对SiC_(p)/Mg-Zn-Y-Ca复合材料组织与性能的影响

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材料热处理学报 2022年第2期43卷 1-9页

作者：张晋华聂凯波邓坤坤康心锴郭亚超太原理工大学材料科学与工程学院山西太原030024 太原理工大学先进镁基材料山西省重点实验室山西太原030024

采用锻造+挤压对SiC_(p)/Mg-Zn-Y-Ca复合材料进行复合变形,研究挤压温度对其组织与力学性能的影响。结果表明:当挤压温度从190℃降低到150℃时,SiC_(p)/Mg-Zn-Y-Ca复合材料的晶粒尺寸随挤压温度的降低而逐渐细化,同时再结晶体积分数也... 详细信息

采用锻造+挤压对SiC_(p)/Mg-Zn-Y-Ca复合材料进行复合变形,研究挤压温度对其组织与力学性能的影响。结果表明:当挤压温度从190℃降低到150℃时,SiC_(p)/Mg-Zn-Y-Ca复合材料的晶粒尺寸随挤压温度的降低而逐渐细化,同时再结晶体积分数也随之减少。不同的挤压温度下复合材料中均存在MgZn_(2)相的动态析出,且析出相尺寸随挤压温度降低逐渐减小,而析出相体积分数逐渐增加。在150℃以0.1 mm/s的挤压速度挤压后,SiC_(p)/Mg-Zn-Y-Ca复合材料的强度最高,其屈服强度和抗拉强度分别为337.2和405.3 MPa。

关键词：镁基复合材料锻造热挤压显微组织力学性能

固溶处理对6061铝合金显微组织与力学性能的影响

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材料热处理学报 2024年第8期45卷 41-47页

作者：史权新邓坤坤聂凯波林涛梅表闹太原理工大学材料科学与工程学院山西太原030024 太原理工大学分析测试中心山西太原030024 浙江宏鑫科技股份有限公司浙江台州317000

采用光学显微镜(OM)、电子背散射衍射(EBSD)和维氏显微硬度计研究了固溶处理对压缩态6061铝合金显微组织与力学性能的影响。结果表明:压缩态6061铝合金经过固溶处理后有细小等轴再结晶晶粒形成,再结晶晶粒的形成弱化了其织构强度。随着... 详细信息

采用光学显微镜(OM)、电子背散射衍射(EBSD)和维氏显微硬度计研究了固溶处理对压缩态6061铝合金显微组织与力学性能的影响。结果表明:压缩态6061铝合金经过固溶处理后有细小等轴再结晶晶粒形成,再结晶晶粒的形成弱化了其织构强度。随着固溶处理时间增加,合金中的再结晶晶粒增多,织构强度降低。6061铝合金经过固溶处理后由于固溶强化的作用导致其硬度显著增大,但随着固溶处理时间的增加,合金的晶粒尺寸增大,细晶强化作用降低,致使合金的硬度值有所减小。

关键词： 6061铝合金固溶处理显微组织显微硬度

热挤压对双尺度SiC_(p)/AZ91镁基复合材料显微组织与拉伸性能的影响

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精密成形工程 2021年第3期13卷 70-76页

作者：王翠菊孙雪飞聂凯波邓坤坤太原理工大学材料科学与工程学院太原030024

目的细化SiC_(p)/AZ91镁基复合材料基体晶粒,提高其拉伸强度。方法基于半固态搅拌铸造的方法制备出双尺度SiC_(p)/AZ91镁基复合材料(标记为M-9+S-1)。在不同温度下对M-9+S-1进行慢速挤压,研究挤压温度对其显微组织和力学性能的影响规律... 详细信息

目的细化SiC_(p)/AZ91镁基复合材料基体晶粒,提高其拉伸强度。方法基于半固态搅拌铸造的方法制备出双尺度SiC_(p)/AZ91镁基复合材料(标记为M-9+S-1)。在不同温度下对M-9+S-1进行慢速挤压,研究挤压温度对其显微组织和力学性能的影响规律。结果SiC_(p)一方面能够促进DRX形核,使M-9+S-1复合材料基体晶粒得以显著细化;另一方面,能够促进大量细小Mg_(17)Al_(12)相的动态析出,显著提升热挤压后的性能。结论M-9+S-1经250℃热挤压后,基于动态析出和动态再结晶的双重作用,拉伸性能得以显著提升,其中,屈服强度和抗拉强度可分别提升至~342 MPa和~380 MPa。

关键词：颗粒增强镁基复合材料显微组织力学性能

Corrosion Resistance of AZ91 Mg Alloy Modified by High-Current Pulsed Electron Beam

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Acta Metallurgica Sinica(English Letters) 2019年第2期32卷 218-226页

作者： Peng-Peng Wu Kun-Kun Deng kai-bo nie Zhong-Zhong Zhang Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and EngineeringTaiyuan University of Technology

The high-current pulsed electron beam(HCPEB) treatment with current density 6 J/cm^2 was applied on AZ91 Mg alloy to improve its corrosion resistance. Results showed that the net-like Mg_(17)Al_(12) disappeared on the surface of AZ91 Mg alloy after irradiation by HCPEB, which was instead of supersaturated Al element on the surface. Nevertheless, the application of HCPEB also led to the formation of crater-like and groove-like structures as well as micro-cracks on the surface of AZ91 Mg alloy. After HCPEB treatment by 3, 5 and 10 pulses, the AZ91 Mg alloy exhibited better corrosion ***, the increasing amount of micro-cracks reduced the anti-corrosive properties of AZ91 Mg alloy as the pulse increased to 20 and 30.

关键词： High-current pulsed electron beam(HCPEB) Corrosion resistance Electrochemical impedance spectroscopy(EIS) AZ91 Mg alloy Microstructure

Recent Research on the Deformation Behavior of Particle Reinforced Magnesium Matrix Composite: A Review

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Acta Metallurgica Sinica(English Letters) 2019年第4期32卷 413-425页

作者： Kun-Kun Deng Cui-Ju Wang kai-bo nie Xiao-Jun Wang Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and Engineering Taiyuan University of Technology School of Materials Science and Engineering Harbin Institute of Technology

Particle reinforced magnesium matrix composite(PMMC) possesses the merits of high specific strength, high specific modulus, better dimensional stability, good wear resistance and lower production cost, which is thought as a promising material in the field of aerospace, automobile, electronic communication, etc. To eliminate the casting defect, the PMMC is usually experienced hot deformation process. The present paper mainly focuses on the deformation behavior of PMMCs. First, the development of PMMCs based on particle size is introduced. Then, the hot deformation technology and deformation mechanism of PMMCs at elevated temperature are given and analyzed, respectively. After reviewing the dynamic recrystallization and texture of PMMCs, its future development is suggested based on the current research progress.

关键词： Magnesium matrix composite Particle Hot deformation Deformation mechanism Recrystallization

Effect of Ti_(p) Content on the Work Hardening and Softening Behavior of Mg-Zn-Ca Alloy

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 551-560页

作者： Jin-kai Zhang Cui-Ju Wang Yi-Dan Fan Chao Xu kai-bo nie Kun-Kun Deng Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The Ti_(p)/ZX60 composites with different Ti_(p) contents were prepared by semi-solid stirring *** extrusion,the microstructure,work hardening and softening behavior of the Ti_(p)/ZX60 composites were analyzed compared with the ZX60(Mg-6Zn-0.2Ca)*** results showed that the addition of Ti_(p) could not only promote the nucleation of dynamic recrystallized(DRXed)grains,but also be propitious to the refinement of DRXed *** increasing Ti_(p) content,the size of DRXed grains decreased accompanied with increasing volume fraction of DRXed *** the Ti_(p) content increased to 15 vol.%,the average size and volume fraction of DRXed grains reached to~0.32μm and 93.2%,***,both the strength and elongation were improved by the addition of Ti_(p).With increasing content of Ti_(p),a substantial increase in the strength was achieved with little change in the ***,the elongation decreased sharply when the Ti_(p) content further increased to 15 vol.%.The addition of Ti_(p) led to an increase in the work hardening rate,which gradually increased with increasing Ti_(p) ***,the softening rate did not demonstrate the same tendency with increasing Ti_(p) *** the conventional ceramic particles,the Ti_(p) can be deformed in coordination with the matrix alloy,which imparted a higher softening rate to the matrix *** though the softening rate improved as the Ti_(p) content increased from 5 to 10 vol.%,it dropped deeply as the Ti_(p) content increased to 15 vol.%owing to the fracture of Ti_(p) during extrusion.

关键词： Titanium particle content Particle reinforced magnesium matrix composites Work hardening Softening behavior Mechanical properties

Microstructure, Tensile Properties and Work Hardening Behavior of an Extruded Mg–Zn–Ca–Mn Magnesium Alloy

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Acta Metallurgica Sinica(English Letters) 2020年第7期33卷 922-936页

作者： kai-bo nie Zhi-Hao Zhu Paul Munroe Kun-Kun Deng Jun-Gang Han College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Materials Science and Engineering UNSW AustraliaKensingtonNSW 2052Australia

A new Mg-2.2 wt% Zn alloy containing 1.8 wt% Ca and 0.5 wt% Mn has been developed and subjected to extrusion under different extrusion *** finest(~0.48 μm) recrystallized grain structures,containing both nano-sized MgZn2 precipitates and α-Mn nanoparticles,were obtained in the alloy extruded at 270℃/0.01 mm *** this alloy,the deformed coarse-grain region possessed a much stronger texture intensity(~32.49 mud) relative to the recrystallized fine-grain region(~13.99 mud).A positive work hardening rate in the third stage of work hardening curve was also evident in the alloy extruded at 270℃,which was related to the sharp basal texture and which provided insufficient active slip *** high work hardening rate in the fourth stage contributed to the high ductility extruded at 270℃/1 mm *** alloy exhibited a weak texture,and the examination of fracture surface revealed highly dimpled *** optimum tensile strength was achieved in the alloy extruded at 270℃/0.01 mm s-1,and the yield strength,ultimate tensile strength and elongation to failure were^364.1 MPa,~394.5 MPa and^7.2%,*** grain strengthening from the recrystallized fine-grain region played the greatest role in the strength increment of this alloy compared with Orowan strengthening and dislocation strengthening in the deformed coarse-grain regions.

关键词： alloy grain strengthening

Molecular mechanism and research progress of traditional Chinese medicine in the treatment of prostate cancer

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Traditional Medicine Research 2025年第1期10卷 62-72页

作者： Hai-Luo Wang Ruo-Ran Zhang Hao Wang Peng Xu Jing-kai Wang bo Chen Hao Xu Deng Pan Yu-Yang Ma Kun Pang Department of Urology Xuzhou Central HospitalXuzhou Clinical School of Xuzhou Medical CollegeXuzhou 221009China Graduate School Jiangsu UniversityZhenjiang 212013China Graduate School Bengbu Medical UniversityBengbu 233040China Department of Urology The Peixian People’s HospitalXuzhou 221699China.

Prostate cancer(PCa)is one of the most common malignant tumors in the male genitourinary system,ranking second in incidence *** Chinese medicine(TCM),as an important component of complementary and alternative medicine,shows unique advantages in cancer *** herbal medicine is usually composed of multiple ingredients and involves multiple signaling pathways,which showed function of inducing apoptosis of cancer cells,arresting the cell cycle,inhibiting invasion and metastasis,reducing drug resistance,and regulating immune *** therapy is also an important treatment of ***,Physical therapy such as acupuncture or Tai Chi and Qigong are gaining increased recognition in the management of PCa,particularly in addressing issues like urinary incontinence and bone metastasis-related *** article reviews the TCM treatment and therapy of PCa,in order to provide new research avenues and treatment options for the treatment of PCa with TCM and improve the quality of life of patients.

关键词： traditional Chinese medicine prostate cancer Chinese herbal medicine physical therapy