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Improving the yield strength of an antibacterial 304Cu austenitic stainless steel by the reversion treatment
Somani, Mahesh C.1; Jaskari, Matias1; Sadeghpour, Saeed1; Hu, Chengyang2; Misra, R. Devesh K.2; Tun Tun Nyo1; Yang, Chung3; Karjalainen, L. Pentti1
Corresponding AuthorSomani, Mahesh C.(mahesh.somani@oulu.fi)
2020-08-19
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume793Pages:15
AbstractAs 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%.
Keyword304Cu austenitic stainless steel Reversion treatment Grain size Precipitation Yield strength Antibacterial property
Funding OrganizationAcademy of Finland under the Genome of Steel
DOI10.1016/j.msea.2020.139885
Indexed BySCI
Language英语
Funding ProjectAcademy of Finland under the Genome of Steel[311934]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000578957200043
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141008
Collection中国科学院金属研究所
Corresponding AuthorSomani, Mahesh C.
Affiliation1.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
Recommended Citation
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.
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