Study on the influence of Si on the microstructure and mechanical properties of DZ125 recycled alloy

doi:10.1016/j.mtcomm.2024.111352

IMR OpenIR

	Study on the influence of Si on the microstructure and mechanical properties of DZ125 recycled alloy
	Chen, Chu 1; Ning, Likui 1; Xie, Zhiwen 2; Liu, Enze 1; Tan, Zheng 1; Li, Haiying 1; Tong, Jian 1; Liu, Weihua 1; Zheng, Zhi 1
通讯作者	Ning, Likui(lkning@imr.ac.cn)
	2025
发表期刊	MATERIALS TODAY COMMUNICATIONS
卷号	42 页码:10
摘要	The microstructure of DZ125 alloy remelted material with varying Si contents was observed and analyzed using optical, scanning electron, and transmission electron microscopes. We investigated the correlation between Si and changes in mechanical properties, focusing on Silicon's impact on the alloy's microstructure and mechanical attributes. Results revealed that as Si content increases in the as-cast microstructure, the gamma' phase size becomes finer, with minimal effects on its volume fraction. Carbide content and size increased, showing a gradual concentration in size distribution, while gamma + gamma' eutectic content and dendrite arm spacing remained largely unaffected. Following standard heat treatment, carbides transformed into fine granular particles, the gamma' phase size refined further, and both gamma' phase and gamma + gamma' eutectic content decreased, with no significant dendrite arm spacing changes. The influence of Si on the heat-treated microstructure followed a similar pattern to that of the as-cast condition but was more pronounced. Room temperature tensile tests indicated that increasing Si content initially enhanced elongation at break and reduction of area at fracture, peaking at 0.08 % Si, before declining. Dimple count increased, while tensile strength remained mostly unaffected. Stress rupture tests at 760 degrees C/725 MPa and 980 degrees C/235 MPa showed that the addition of Si significantly enhanced the endurance performance, with an improvement of over 20 %.
关键词	DZ125 alloy Recycled material Si Mechanical behavior
资助者	National Key Research and Develop-ment Program of China
DOI	10.1016/j.mtcomm.2024.111352
收录类别	SCI
语种	英语
资助项目	National Key Research and Develop-ment Program of China[2022YFB3705004]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001394331800001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180834
专题	中国科学院金属研究所
通讯作者	Ning, Likui
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol Liaoning, Sch Mech Engn & Automat, Anshan 114051, Peoples R China
推荐引用方式 GB/T 7714	Chen, Chu,Ning, Likui,Xie, Zhiwen,et al. Study on the influence of Si on the microstructure and mechanical properties of DZ125 recycled alloy[J]. MATERIALS TODAY COMMUNICATIONS,2025,42:10.
APA	Chen, Chu.,Ning, Likui.,Xie, Zhiwen.,Liu, Enze.,Tan, Zheng.,...&Zheng, Zhi.(2025).Study on the influence of Si on the microstructure and mechanical properties of DZ125 recycled alloy.MATERIALS TODAY COMMUNICATIONS,42,10.
MLA	Chen, Chu,et al."Study on the influence of Si on the microstructure and mechanical properties of DZ125 recycled alloy".MATERIALS TODAY COMMUNICATIONS 42(2025):10.