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Transactions of Nonferrous Metals Society of China 2021年第7期31卷 1885-1901页

作者： Cun-sheng ZHANG Zhao-gang ZHANG Ming-fu LIU En-cheng BAO Liang CHEN Guo-qun ZHAO Key Laboratory for Liquid−solid Structural Evolution&Processing of Materials(Ministry of Education) Shandong UniversityJi’nan 250061China

The effects of single-stage solution treatment(SST),enhanced solution treatment(EST),high-temperature pre-precipitation(HTPP)and multi-stage solution treatment(MST)on the microstructure,mechanical properties and corrosion resistance of the as-extruded 7055 aluminium alloy(AA7055)helical profile were investigated using differential scanning calorimetry(DSC),optical microscopy(OM),scanning electron microscopy(SEM),electron back-scattered diffraction(EBSD)and transmission electron microscopy(TEM).It was observed that EST and MST could promote the dissolution of the second-phase particles compared with the traditional SST,and the intergranular phases were distinctly discontinuously distributed after HTPP and *** was obvious difference in the main texture type and texture strength for the alloy after different solid solution *** could improve the corrosion resistance of the alloy by regulating the intergranular phases,but the mechanical properties were severely *** the good corrosion resistance of the alloy could be obtained by MST without obvious strength *** a result,the MST is an ideal solid solution treatment scheme for AA7055.

关键词： 7055 aluminum alloy extruded profile solid solution treatment mechanical properties corrosion resistance

Identification of optimal solid solution temperature for Sm_(2)Co_(17)-type permanent magnets with different Fe contents

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Rare Metals 2021年第12期40卷 3567-3574页

作者： Shuai Wang Hong-Sheng Chen Yi-Kun Fang Chao Wang Lei Wang Ming-Gang Zhu Wei Li Division of Functional Materials Research Central Iron and Steel Research InstituteBeijing 100081China

It is confirmed that the solid solution temperature range to obtain optimal magnetic properties is different for the magnets with different Fe contents,and the correlation between magnetic properties and microstructures influenced by solid solution temperature(Ts)has been systematically *** optimal solid solution temperature range is 1413-1463 K for the Sm(Co_(bal)Fe_(0.213)Cu_(0.073)Zr_(0.024))_(7.6)magnet,which is higher than that of the Sm(Co_(bal)Fe_(0.262)Cu_(0.073)Zr_(0.024))_(7.6)magnet(1403-1453 K),and the optimal T_s range is about 50 K for both of the *** solid solution temperature range shifting toward relatively high temperature is due to the increase in a phase transition *** magnet solution-treated at proper temperature exhibits 1:7 H single phase,and intact cell structure and high Cu concentration(23.12 at%)in the cell boundary are found after aging process,which makes the magnet shows high intrinsic coercivity(H_(cj))and magnetic field at knee-point(H_(knee)).At a lower solid solution temperature,the 2:17 H,1:5 H and Zr-rich precipitation phases appear,which affects the cell structure,density of lamellar phase and Cu concentration in the cell boundary,leading to the reduced magnetic ***,at a higher solid solution temperature,there exist obviously light gray and dark regions with different Sm,Cu and Fe contents in scanning electron microscopy observation,and the magnet shows low pinning field in the two regions and incomplete cell structure,resulting in an inferior H_(cj)and H_(knee).

关键词： Sm_(2)co_(17)-type magnets Magnetic properties solid solution treatment Iron content Microstructures

Effect of solution treatment on Recrystallization,Texture and Mechanical Properties of 7A65-T74 Aluminum Alloy Super-thick Hot Rolled Plate

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Journal of Wuhan University of Technology(Materials Science) 2022年第3期37卷 460-469页

作者： LI Chen WANG Hao WANG Wenbo YE Chengtong JIN Zuheng ZHANG Xinquan ZHANG Hu JIA Lina The First Aircraft of Institute of AVIC Xi’an 710000China Department of Materials Science and Engineering Beihang UniversityBeijing 100191China Research Center for Lightweight Materials Ningbo Institute of TechnologyBeihang UniversityNingbo 315100China

The effects of the solution treatment on the microstructure,recrystallization,texture composition and properties of 7A65-T7451(120 mm)hot rolled plates at H/2(1/2 thickness)and H/4(1/4 thickness)were *** results show that the hot rolled microstructure mainly contains a large amount of MgZn_(2) phases and minor Al_(7)Cu_(2)Fe *** solid solution treatments,a large amount of MgZn_(2) phases are dissolved back into the aluminum *** main texture types at H/4 are R-Cube,Cube and part of Brass texture,and the main texture types at H/2 are Cube,R,and Copper *** qualitative analysis by Schmidt's law reveals that Copper texture at H/2 will deepen the anisotropy of plate metal *** the plate with the same thickness,the two-stage solution state has better mechanical properties due to the lower degree of recrystallization and stronger grain boundary strengthening *** the two-stage solution system of 460℃/165 min+477℃/165 min,the composite mechanical properties of the alloy plate at H/4 are the best and the anisotropy is not *** tensile strength,yield strength,and elongation along the rolling direction are 561.9 MPa,523.4 MPa,and 10.6%,respectively..

关键词： 7A65 thick plate solid solution treatment texture recrystallization anisotropic

Characterization of a Mg_(95.5)Zn_(1.5)Y_(3)alloy both containing W phase and LPSO phase with or without heat treatment

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Journal of Magnesium and Alloys 2017年第2期5卷 217-224页

作者： Li Zhumin Wan Diqing Huang Yi Ye Shuting Hu Yinglin School of Materials Science and Engineering East China Jiaotong UniversityNanchang 330013China Materials Research Group Faculty of Engineering and the EnvironmentUniversity of SouthamptonSouthampton SO171 BJUK

The influence of solid solution treatment on the microstructure and corrosion resistance of as-cast Mg_(95.5)Zn_(1.5)Y_(3) alloy is *** microstructure of the as-cast Mg_(95.5)Zn_(1.5)Y_(3) alloy mainly consisted ofα-Mg,W(Mg_(3)Zn_(3)Y_(2))phase,and the long period stacking ordered(LPSO)(Mg_(12)ZnY)*** solid solution treatment,most of the W phase disappears gradually with increasing solution treatment time,with only a small amount of W phase distributed as *** LPSO phase slightly dissolved into substrate,and its morphology transitions from blocky shape to rod *** solution treatment of Mg_(95.5)Zn_(1.5)Y_(3) exhibits excellent corrosion resistance,because the Y and Zn atoms became enriched in the matrix and the changed morphologies of the LPSO and W phases were modified through heat *** alloy created with solid solution treatment at 520 ℃ for 10 hours exhibits corrosion potential of−1.419 V,suggesting a significant improvement in corrosion performance.

关键词： Magnesium alloys LPSO phase solid solution treatment Corrosion resistance

IINFLUENCE OF HEAT treatment TECHNOLOGY ON PROPERTY OF LOW COBALT Fe-Cr-Co PERMANENT MAGNETIC ALLOY

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 911-916页

作者： Y.M.Wang and L.X.Ding Department of material, School of Mechanical Engineering, Shenyang University, Shenyang 110044, China

The research is carried out through specification measurement of magnetic property, photo analysis of electronic microscope, metallographic analysis, micro hard and so on means. The initial researches have been done about the influence on material property by solid solution treatment, heat magnetic treatment and aging treatment technology of the low cobalt Fe Cr Co alloy. Therefore, better productive technologies have been found.

关键词： permanent magnetic alloy solid solution treatment aging treatment,cobalt.

Effect of solution treatment and artificial aging on microstructure and mechanical properties of Al-Cu alloy

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Transactions of Nonferrous Metals Society of China 2013年第3期23卷 631-635页

作者： Jae-Ho JANG Dae-Geun NAM Yong-Ho PARK Ik-Min PARK Korea Institute of Industrial Technology Busan 618-230Korea School of Material Science and Engineering Pus an National UniversityBusan 609-735Korea

In order to achieve good mechanical properties of Al-Cu alloys such as high strength and good toughness,precipitation hardening and artificial aging treatment were *** defined by the T6 heat treatment,the standard artificial aging treatment for Al-Cu alloy followed heat treatments of solution treatment at 510-530 ℃ for 2 h,quenching in water at 60 ℃ and then artificial aging at 160-190 ℃ for 2-8 *** effects of solution treatment and artificial aging on the microstructure and mechanical properties of Al-Cu alloy were studied by optical microscopy（OM）,scanning electron microscopy（SEM）,energy dispersive X-ray spectroscopy（EDS）,transmission electron microscopy（TEM） and tensile *** results of solution treatment indicate that the mechanical properties of Al-Cu alloy increase and then decrease with the increase of solution *** is because the residual phases dissolve gradually into the matrix,and the fraction of the precipitation and the size of the re-crystallized grain *** to the solution temperature,the solution holding time has less effect on the microstructure and the mechanical properties of Al-Cu *** artificial aging treatments were conducted at 160-180 ℃ for 2-8 *** results show that the ultimate tensile strength can be obtained at 180 ℃ for 8 *** tensile strength increased with increasing time or *** strength was found as the same as the ultimate tensile strength result.

关键词： Al-Cu alloy solid solution treatment artificial aging microstructure mechanical property

Tailoring AZ91 laminates for combination of strength and ductility

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Transactions of Nonferrous Metals Society of China 2021年第12期31卷 3703-3718页

作者： Xiang CHEN Wei-zhang WANG Jun-lei ZHANG Guang-sheng HUANG Shuai-shuai LIU Ai-tao TANG Bin JIANG Fu-sheng PAN State Key Laboratory of Mechanical Transmission College of Materials Science and EngineeringChongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

Three types of laminates were designed by alternately stacking AZ91 extruded sheets in different states for extrusion to improve the mechanical *** tensile tests revealed that the combination of solid-solution-treated sheets with the aging-treated sheets achieved high tensile strength and ductility,i.e.,ultimate tensile strength of~386 MPa and elongation of~19.8%,*** backscatter diffraction(EBSD)and TEM results indicated that the aging-treated layers with more nano-sized precipitates and small grain size provided high strength and reasonable ductility,while the solid-solution-treated layers with low dislocation density facilitated strain ***,the strong interface bonding between the successive layers played an important role in the enhanced ductility.

关键词： AZ91 Mg alloy solid solution treatment aging extrusion mechanical properties

Effects of Ru Additions on the Microstructures and Stress Rupture Life of a Directionally solidified Ni-based Cast Superaiioy

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Effects of Ru Additions on the Microstructures and Stress Ru...

Grain Growth Behavior of 5Cr21Mn9Ni4N Steel Micro-Alloyed by Rare Earth

International Conference on Aerospace Materials(ICAM 2006)

作者： Xiaolei Han, Yafang Han, Shusuo Li, Wenyou Ma School of Material Science and Engineering, Beihang University, Beijing 100083, China

Two directionally solidified (DS) Ni-based cast superalloys without and with 3wt. % Ru were prepared. The effects of Ru addition on the microstructures and stress rupture properties of the heat treated superalloys were investigated. It is shown that the amount of eutectic in 3wt. % Ru alloy was less than that in alloy without Ru. The incipient melting structure was found after quenching followed by 1295℃ and 1300℃ solid solution treatments in 3wt. % Ru alloy and in the alloy without Ru, respectively. The temperature at which the eutectic pools dissolved completely was higher than the temperature at which incipient melting appears. In order to obtain the better mechanical properties, double aging treatment was carried out for both alloys to optimize the sizes, morphologies and distribution of the γ' phase. The stress rupture lives of the alloys were 55h and 108h under the condition of 1070℃ and 137MPa the alloys without Ru and with 3wt. % Ru respectively. It is suggested that 3wt. % Ru addition can prolong the stress rupture life of the alloy.

关键词： solid solution treatment aging treatment OS Ni base superalloy Ru stress rupture properties

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Journal of Rare Earths 2006年第1期24卷 120-120页

作者： Yu Shichang Wu Shenqing Gong Youjun Gong Yuansheng Lian Mingsheng Ye Gang Cheng Yijun Department of Material Science and Engineering Southeast University Nanjing 210096 China Jiangsu Shenyuan Special Steel Co. Ltd. Xinghua 225722 China

Grain growth behavior of 5Cr21Mn9Ni4NRE steel was experimentally studied at various solid solution treatment temperatures and holding for different times. The experimental results show that the 5Cr21Mn9Ni4NRE steel has the feature of sharp austenite grain coarsening after solid solution treatment at the temperature above 1150 ℃. RE added in the steel has the benefit to restrain grain growth and increase grain growth activation energy.

关键词： solid solution treatment Rockwell hardness grain growth grain growth exponent rare earths