Effects of isothermal heat treatment on microstructural evolution ZC61-0.3Cr magnesium alloy

doi:10.19476/j.ysxb.1004.0609.2018.10.02

	Effects of isothermal heat treatment on microstructural evolution ZC61-0.3Cr magnesium alloy
	Huang, Xiao-Feng 1,2; Ma, Ya-Jie 1; Zhang, Yu 1; Zhang, Qiao-Qiao 1; Guo, Feng 1; Yang, Jian-Chang 1
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2018-10-01
卷号	28 期号:10 页码:1962-1971
关键词	Chromium alloys Coarsening Grain boundaries Heat treatment Isotherms Microstructural evolution Morphology Ostwald ripening Particle size Average particle size Dendritic microstructure Eutectic microstructure Holding temperatures Isothermal heat treatments Non-dendritic microstructure Optimum process conditions Solid phase particles
ISSN号	10040609
DOI	10.19476/j.ysxb.1004.0609.2018.10.02
英文摘要	The effects of the isothermal heat-treatment temperature and holding time on semi-solid microstructural evolution of ZC61-0.3Cr magnesium alloy were investigated. The results indicate that the original dendritic microstructure in ZC61-0.3Cr alloy can be transformed into semi-solid non-dendritic microstructure and can obtain uniform and round spherical particles during the isothermal heat-treatment. With the increase of holding time, the eutectic microstructure (α-Mg+MgZn2+CuMgZn) at the grain boundaries is melted preferentially, the original dendritic microstructure in the alloy is turned into semi-solid non-dendritic microstructure by initial coarsening, microstructure separation and spheroidizing. As the holding time increases, the microstructure of alloy gradually changes from large block to spherality. However, the coarsening and growth of spherical particles would cause, when the holding temperature is too high or the holding time is too long. In the process of coarsening and growth, the mechanism of combining growth and Ostwald ripening coexist and together affect morphology and size of the solid phase particles. The optimum process condition for semi-solid forming of ZC61-0.3Cr magnesium alloy is (585, 30 min). Under this condition, the average particle size, shape factor and solid fraction are 43 μm, 1.4 and 51%, respectively. © 2018, Science Press. All right reserved.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114132]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Non-ferrous Metal Alloys and Processing, Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Huang, Xiao-Feng,Ma, Ya-Jie,Zhang, Yu,et al. Effects of isothermal heat treatment on microstructural evolution ZC61-0.3Cr magnesium alloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2018,28(10):1962-1971.
APA	Huang, Xiao-Feng,Ma, Ya-Jie,Zhang, Yu,Zhang, Qiao-Qiao,Guo, Feng,&Yang, Jian-Chang.(2018).Effects of isothermal heat treatment on microstructural evolution ZC61-0.3Cr magnesium alloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,28(10),1962-1971.
MLA	Huang, Xiao-Feng,et al."Effects of isothermal heat treatment on microstructural evolution ZC61-0.3Cr magnesium alloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 28.10(2018):1962-1971.