The influence of ultrafine-grained structure on the mechanical properties and biocompatibility of austenitic stainless steels

被引：13
|
作者：
Rybalchenko, Olga V. [1 ,2 ]
Anisimova, Natalia Yu. [2 ,3 ]
Kiselevsky, Mikhail V. [2 ,3 ]
Belyakov, Andrey N. [4 ]
Tokar, Aleksei A. [1 ,2 ]
Terent'ev, Vladimir F. [1 ]
Prosvirnin, Dmitry V. [1 ]
Rybalchenko, Georgy V. [5 ]
Raab, Georgi I. [6 ]
Dobatkin, Sergey V. [1 ,2 ]
机构：
[1] RAS, AA Baikov Inst Met & Mat Sci, Leninsky Prospect 49, Moscow 119334, Russia
[2] Natl Univ Sci & Technol MISIS, Lab Hybrid Nanostruct Mat, Moscow, Russia
[3] Hlth Minist Russia, NN Blokhin Natl Med Res Ctr Oncol, Moscow, Russia
[4] Belgorod State Univ, Belgorod, Russia
[5] RAS, PN Lebedev Phys Inst, Moscow, Russia
[6] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa, Russia
来源：
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS | 2020年 / 108卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
austenitic stainless steels; biocompatibility in vitro; equal-channel angular pressing; strength and fatigue properties; ultrafine grained structures; OSTEOBLAST; ALLOYS; CYTOCOMPATIBILITY; COMPOSITES; DUCTILITY; STRENGTH; FATIGUE;
D O I：
10.1002/jbm.b.34494
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
In this study, equal-channel angular pressing (ECAP) of austenitic 316L and Cr-Ni-Ti stainless steels was carried out. Effect of ECAP at 400 degrees C on the evolution of the microstructure, mechanical properties, and biocompatibility of these steels was investigated. The biocompatibility of samples with the ultrafine grain structure obtained in the ECAP process did not deteriorate in comparison with an austenitic 316L stainless steel in coarse-grained state. However, this treatment enhances the multipotent mesenchymal stromal/stem cell proliferation by 26% for 316L steel and by 17% for Cr-Ni-Ti stainless steel in comparison with coarse-grained counterparts. At the same time, ECAP contributes to a significant improvement in performance and weight reduction of medical devices, which is especially important for the creation of implanted prostheses for replacement of skeletal defects, due to significant increase in specific strength of steels. The strength properties of austenitic stainless steels were remarkably improved due to the grain refinement and deformation twinning resulted from ECAP at 400 degrees C. After ECAP, the yield strength of 316L and Cr-Ni-Ti stainless steels increased by 4.2 and 2.9 times up to 950 and 900 MPa, and the fatigue limit by 2 and 1.7 times up to 500 and 475 MPa, respectively, comparing to coarse-grained counterparts.
引用
收藏
页码：1460 / 1468
页数：9
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