高压扭转制备的Mg-Sm-Ca合金组织演变及时效硬化行为

doi:10.11896/cldb.19110214

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Abstract The microstructure and mechanical properties of Mg-Sm-Ca alloy were investigated by combining high pressure torsion (HPT) and aging treatment. Optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), microhardness test, and X-ray diffraction (XRD) analysis results show that nanocrystalline Mg-Sm-Ca alloy were successfully produced after HPT, and the grain size refined from 209 μm to 108 nm. The peak hardness reached 134HV aged at 175 ℃ for 1.5 h, which was about twice the as-cast sample. The structure is still nanocrystalline and has certain anti-recovery and high thermal stability, and a large amount of nano-scale precipitates is introduced, which is different from conventional cold deformed alloys. The HPT-treated Mg-Sm-Ca alloy exhibits a strong (0002) basal texture, and the aging treatment promotes basal slip. the texture of the alloy becomes weaker after aging time is prolonged.

Key words： Mg-Sm-Ca alloy high pressure torsion (HPT) aging texture

Published: 23 March 2021

CLC number:

TG146.4

Fund:National Natural Science Foundation of China (51675092).

About author:: Xiaohuan Liu, born in 1995, major in material engineering of Yanshan University. Mainly engaged in research on severe deformation and aging of magnesium alloys.
Rui Xu, Ph. D., professor, master tutor, worked at Yanshan University, mainly engaged in the research of metal solidification technology and theory. He has published more than 50 papers and 3 books.

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	LIU Xiaohuan
	LI Yansheng
	MAN Yi
	WANG Jinhui
	XU Rui

Cite this article:

LIU Xiaohuan,LI Yansheng,MAN Yi, et al. Microstructure Evolution and Age-hardening Behavior of Mg-Sm-Ca Alloy Processed by High Pressure Torsion[J]. Materials Reports, 2021, 35(6): 6120-6125.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.19110214 OR http://www.mater-rep.com/EN/Y2021/V35/I6/6120

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