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Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C
Li, J. L.; Wang, X. X.; Zhang, N.; Wu, D.; Chen, R. S.; Wu, D; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China.
2017-08-15
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号714页码:104-113
摘要The effect of temperature and strain rate on tensile ductility of a solutionized Mg-Gd-Y-Zr alloy was investigated using uniaxial tensile testing. The result revealed an interesting phenomenon that with the increment of temperature, this alloy exhibited drop of ductility at 350 degrees C along with intergranular fracture. Detailed microstructure observation manifested that local precipitation at grain boundary due to holding process before tension was responsible for the grain boundary embrittlement at 350 degrees C. It was thought that plastic deformation preferentially occurred at the softer solute-depleted zones concurrent with grain boundary precipitates (GBPs), whereas dislocation movement would be effectively inhibited at the hard GBPs, inducing stress concentration and cracking along grain boundary as the solute-depleted zone deformed to its plastic limit. Moreover, it should be noted that the ductility at 350 degrees C was closely related to the holding time which significantly determined the size and distribution of precipitates. The occurrence of local grain boundary precipitation dependent on temperature and time was predominantly attributed to RE elements segregation to grain boundary. (C) 2017 Elsevier B.V. All rights reserved.; The effect of temperature and strain rate on tensile ductility of a solutionized Mg-Gd-Y-Zr alloy was investigated using uniaxial tensile testing. The result revealed an interesting phenomenon that with the increment of temperature, this alloy exhibited drop of ductility at 350 degrees C along with intergranular fracture. Detailed microstructure observation manifested that local precipitation at grain boundary due to holding process before tension was responsible for the grain boundary embrittlement at 350 degrees C. It was thought that plastic deformation preferentially occurred at the softer solute-depleted zones concurrent with grain boundary precipitates (GBPs), whereas dislocation movement would be effectively inhibited at the hard GBPs, inducing stress concentration and cracking along grain boundary as the solute-depleted zone deformed to its plastic limit. Moreover, it should be noted that the ductility at 350 degrees C was closely related to the holding time which significantly determined the size and distribution of precipitates. The occurrence of local grain boundary precipitation dependent on temperature and time was predominantly attributed to RE elements segregation to grain boundary. (C) 2017 Elsevier B.V. All rights reserved.
部门归属[li, j. l. ; wu, d. ; chen, r. s.] chinese acad sci, inst met res, grp magnesium alloys & their applicat, 62 wencui rd, shenyang 110016, peoples r china ; [li, j. l.] univ sci & technol china, sch mat sci & engn, 19 jinzhai rd, hefei 230026, peoples r china ; [wang, x. x. ; zhang, n.] avic shenyang liming aeroengine grp corp, shenyang 110043, peoples r china
关键词Magnesium Alloy Hot Tension Ductility Grain Boundary Precipitation Fracture
学科领域Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者National Natural Science Foundation of China (NSFC) [51301173, 51531002, 51601193]; National Basic Research Program of China (973 Program) [2013CB632202]; National Key Research and Development Program of China [2016YFB0301104]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78021
专题中国科学院金属研究所
通讯作者Wu, D; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Li, J. L.,Wang, X. X.,Zhang, N.,et al. Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,714:104-113.
APA Li, J. L..,Wang, X. X..,Zhang, N..,Wu, D..,Chen, R. S..,...&Chen, RS .(2017).Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C.JOURNAL OF ALLOYS AND COMPOUNDS,714,104-113.
MLA Li, J. L.,et al."Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C".JOURNAL OF ALLOYS AND COMPOUNDS 714(2017):104-113.
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