Mechanical properties of austenitic stainless steel with high niobium contents

被引：9

作者：

Okayasu, M. ^{[1
]}

Wu, S. ^{[1
]}

Noda, K. ^{[1
]}

Lin, D. -Y. ^{[2
]}

Yang, S. -M. ^{[2
]}

机构：

[1] Okayama Univ, Grad Sch Nat Sci & Technol, Kita Ku, 3-1-1 Tsushima Naka, Okayama 7008530, Japan

[2] Natl Univ Kaohsiung, Dept Chem & Mat Engn, 700 Kaohsiung Univ Rd, Kaohsiung 811, Taiwan

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2016年 / 32卷 / 13期

关键词：

Stainless steel; Niobium; Mechanical property; Hall-Petch relationship; Microstructure; HALL-PETCH RELATIONSHIP; HIGH-TEMPERATURE STRENGTH; LOW-ALLOY STEELS; NANOCRYSTALLINE MATERIALS; MICROALLOYED STEELS; GRAIN-SIZE; NB; PRECIPITATION; MICROSTRUCTURE; BEHAVIOR;

D O I：

10.1080/02670836.2015.1126431

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To better understand the influence of the microstructural characteristics on the mechanical properties of Fe-Cr-22-Ni-25-Nb-x austenitic stainless steel (ASS-Nb-x), the mechanical properties were investigated. Nb addition was conducted with four different amounts: 0, 0.29, 0.58 and 0.86%. With the increasing Nb content, the mean grain size for the Fe-Cr-Ni-based alloys decreased, while the size of Nb precipitate increased. Owing to the different microstructural characteristics, their mechanical properties were altered. The highest tensile strength was obtained for ASS-Nb-0.29 alloy. However, with the increasing Nb content in ASS-Nb0.29-0.86 alloys, the tensile strength decreases despite the grain refinement. The mechanical properties of the ASS-Nb alloys were influenced by the Nb precipitation hardening and the grain boundary cohesive strength, arising from the size of Nb precipitations.

引用

页码：1382 / 1394

页数：13

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