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Effect of cold deformation on corrosion fatigue behavior of nickel-free high nitrogen austenitic stainless steel for coronary stent application
Li, J; Yang, YX; Ren, YB; Dong, JH; Yang, K; Yang, K (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2018-04-01
发表期刊JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
卷号34期号:4页码:660-665
摘要Due to the excellent mechanical properties, good corrosion resistance, high biocompatibility and nickel free character, the high nitrogen nickel-free austenitic stainless steel (HNASS) becomes an ideally alternative material for coronary stents. Stent implantation works in harsh blood environment after a balloon dilatation, i.e., the material is used in a corrosive environment with a permanent deformation. The present study attempts to investigate effects of pre-straining on high-cycle fatigue behavior and corrosion fatigue behavior of HNASS in Hank's solution and the relevant mechanism for coronary stents application. It is found that higher pre-straining on HNASS results in higher strength and maintains almost same corrosion resistance. Fatigue limit of 0% HNASS is 550 MPa, while corrosion fatigue limit is 475 MPa. And improvement in fatigue limit of 20% and 35% pre-strained HNASS is in comparison with the 0% HNASS, while corrosion would undermine the fatigue behavior of HNASS. In a suitable range, the pre straining had a beneficial effect on corrosion fatigue strength of HNASS, such as nearly 300 MPa improved with 20% cold deformation. This result provides a good reference for predicting the life of HNASS stent and as well its design. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.; Due to the excellent mechanical properties, good corrosion resistance, high biocompatibility and nickel free character, the high nitrogen nickel-free austenitic stainless steel (HNASS) becomes an ideally alternative material for coronary stents. Stent implantation works in harsh blood environment after a balloon dilatation, i.e., the material is used in a corrosive environment with a permanent deformation. The present study attempts to investigate effects of pre-straining on high-cycle fatigue behavior and corrosion fatigue behavior of HNASS in Hank's solution and the relevant mechanism for coronary stents application. It is found that higher pre-straining on HNASS results in higher strength and maintains almost same corrosion resistance. Fatigue limit of 0% HNASS is 550 MPa, while corrosion fatigue limit is 475 MPa. And improvement in fatigue limit of 20% and 35% pre-strained HNASS is in comparison with the 0% HNASS, while corrosion would undermine the fatigue behavior of HNASS. In a suitable range, the pre straining had a beneficial effect on corrosion fatigue strength of HNASS, such as nearly 300 MPa improved with 20% cold deformation. This result provides a good reference for predicting the life of HNASS stent and as well its design. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
部门归属[li, jun ; yang, yixun ; ren, yibin ; dong, jiahui ; yang, ke] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [li, jun ; yang, yixun ; dong, jiahui] univ sci & technol china, sch mat sci & engn, shenyang 110016, liaoning, peoples r china
关键词Simulated Body-fluid Crack Initiation Mechanisms Implants Temperature Fracture Alloys Gas
学科领域Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者National Natural Science Foundation of China [31370976]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79398
专题中国科学院金属研究所
通讯作者Ren, YB; Yang, K (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Li, J,Yang, YX,Ren, YB,et al. Effect of cold deformation on corrosion fatigue behavior of nickel-free high nitrogen austenitic stainless steel for coronary stent application[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(4):660-665.
APA Li, J,Yang, YX,Ren, YB,Dong, JH,Yang, K,&Yang, K .(2018).Effect of cold deformation on corrosion fatigue behavior of nickel-free high nitrogen austenitic stainless steel for coronary stent application.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(4),660-665.
MLA Li, J,et al."Effect of cold deformation on corrosion fatigue behavior of nickel-free high nitrogen austenitic stainless steel for coronary stent application".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.4(2018):660-665.
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