Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment

doi:10.1016/j.msea.2020.139885

IMR OpenIR

	Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment
	Somani, Mahesh C.1; Jaskari, Matias 1; Sadeghpour, Saeed 1; Hu, Chengyang 2; Misra, R. Devesh K.2; Tun Tun Nyo 1; Yang, Chung 3; Karjalainen, L. Pentti 1
通讯作者	Somani, Mahesh C.(mahesh.somani@oulu.fi)
	2020-08-19
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	793 页码:15
摘要	As an implant material, Cu-bearing austenitic stainless steels can possess the antibacterial property, but their mechanical strength is low. In order to improve the yield strength of a 304Cu (17%Cr-7%Ni-3%Cu) alloy through substantial grain refinement, a research investigation has been taken up to conduct the reversion annealing treatment comprising a heavy (71%) cold rolling reduction followed by annealing at various temperatures (650-950 degrees C) and durations (1-5400 s). The microstructure evolution was examined by electron backscatter diffraction and further characterized by magnetic measurements, and mechanical properties were determined by tensile and hardness testing. The precipitation of Cu was confirmed by transmission electron microscopy. It was found that the reversion of deformation-induced martensite to austenite took place by the shear mechanism, followed by subgrain formation and continuous recrystallization resulting in quite nonuniform grain size distribution. The finest reversed grains were around 0.6 mu m in size, but also much larger austenite grains and a small fraction of unreversed martensite existed in the final structure despite annealing at least up to 800 degrees C. Coherent Cu particles were observed after aging for 1.5 h at 700 and 650 degrees C, while the yield strength could be improved to 507 and 791 MPa, respectively, i.e. by similar to 2-3 times that of the annealed steel. The ductility of the steel remains still high, the fracture elongation being 36%.
关键词	304Cu austenitic stainless steel Reversion treatment Grain size Precipitation Yield strength Antibacterial property
资助者	Academy of Finland under the Genome of Steel
DOI	10.1016/j.msea.2020.139885
收录类别	SCI
语种	英语
资助项目	Academy of Finland under the Genome of Steel[311934]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000578957200043
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：34[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/321006/141008
专题	中国科学院金属研究所
通讯作者	Somani, Mahesh C.
作者单位	1.Univ Oulu, Ctr Adv Steels Res, Oulu 90014, Finland 2.Univ Texas El Paso, Dept Met Mat & Biomed Engn, Lab Excellence Adv Steel Res, El Paso, TX 79968 USA 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Somani, Mahesh C.,Jaskari, Matias,Sadeghpour, Saeed,et al. Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,793:15.
APA	Somani, Mahesh C..,Jaskari, Matias.,Sadeghpour, Saeed.,Hu, Chengyang.,Misra, R. Devesh K..,...&Karjalainen, L. Pentti.(2020).Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,793,15.
MLA	Somani, Mahesh C.,et al."Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 793(2020):15.