Revealing the Interaction Between Dislocations and LPSO-Precipitates Structure in a Mg-Y-Al Alloy at Different Temperatures

doi:10.3390/cryst14121018

IMR OpenIR

	Revealing the Interaction Between Dislocations and LPSO-Precipitates Structure in a Mg-Y-Al Alloy at Different Temperatures
	Zhu, Qingchun 1; Li, Yangxin 2,3; Zhang, Huan 2,3; Wang, Jie 2,3; Jiang, Hongxiang 4; Zhao, Jiuzhou 4
通讯作者	Li, Yangxin(astatium@sjtu.edu.cn) ; Jiang, Hongxiang(hxjiang@imr.ac.cn)
	2024-12-01
发表期刊	CRYSTALS
卷号	14 期号:12 页码:11
摘要	Precipitation strengthening represents a crucial strengthening approach in the realm of metals, with particular significance for magnesium. In this study, a complex LPSO-precipitate structure, which is constituted of the principal secondary phases in Mg rare earth (RE) alloys, namely the Long-Period Stacking Ordered (LPSO) phase and the aging precipitate, was successfully fabricated within a Mg-11Y-1Al alloy. Subsequently, an in-depth investigation was conducted regarding the interaction between dislocations and this LPSO-precipitate structure under varying temperature conditions. The findings revealed that, at room temperature (RT), the aging precipitates effectively hindered the movement of basal dislocations, and the activation of non-basal dislocations is rather difficult, resulting in the alloy's high strength and low plasticity. When the temperature was elevated to 200 degrees C, although non-basal slip could be initiated, the LPSO-precipitate structure was capable of blocking both basal and non-basal slips. Consequently, the alloy still demonstrated high strength and low plasticity. As the temperature further increased to 250 degrees C, dislocations could cut through the aging precipitate particles, and the interior of the grains could provide partial deformation. Hence, the tensile elongation of the alloy was significantly enhanced, increasing from 4% to 12% as the temperature was elevated from 200 degrees C to 250 degrees C. These results suggest that the LPSO-precipitate structure still exerts a remarkable strengthening effect at 200 degrees C. When the temperature reaches 250 degrees C, the plasticity of the alloy is improved but its strength decreases. The research outcomes presented in this paper offer a novel perspective for the precise tailoring of mechanical properties through precipitation strengthening within Mg-RE alloys.
关键词	Mg-RE alloy LPSO-precipitate structure elongation dislocation
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Natural Science Foundation of Shanghai
DOI	10.3390/cryst14121018
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China ; National Natural Science Foundation of China[52301026] ; China Postdoctoral Science Foundation[2023M743660] ; Natural Science Foundation of Shanghai[23ZR1431100] ; [2021YFA0716303]
WOS研究方向	Crystallography ; Materials Science
WOS类目	Crystallography ; Materials Science, Multidisciplinary
WOS记录号	WOS:001383786600001
出版者	MDPI
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/181179
专题	中国科学院金属研究所
通讯作者	Li, Yangxin; Jiang, Hongxiang
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 2.Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China 3.Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composite, Shanghai 200240, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Qingchun,Li, Yangxin,Zhang, Huan,et al. Revealing the Interaction Between Dislocations and LPSO-Precipitates Structure in a Mg-Y-Al Alloy at Different Temperatures[J]. CRYSTALS,2024,14(12):11.
APA	Zhu, Qingchun,Li, Yangxin,Zhang, Huan,Wang, Jie,Jiang, Hongxiang,&Zhao, Jiuzhou.(2024).Revealing the Interaction Between Dislocations and LPSO-Precipitates Structure in a Mg-Y-Al Alloy at Different Temperatures.CRYSTALS,14(12),11.
MLA	Zhu, Qingchun,et al."Revealing the Interaction Between Dislocations and LPSO-Precipitates Structure in a Mg-Y-Al Alloy at Different Temperatures".CRYSTALS 14.12(2024):11.