Effect of ultrafine grain on tensile behaviour and corrosion resistance of the duplex stainless steel

Lv Jinlong; Liang Tongxiang; Wang Chen; Dong Limin

doi:10.1016/j.msec.2016.02.008

Effect of ultrafine grain on tensile behaviour and corrosion resistance of the duplex stainless steel

Mater Sci Eng C Mater Biol Appl. 2016 May:62:558-63. doi: 10.1016/j.msec.2016.02.008. Epub 2016 Feb 5.

Authors

Lv Jinlong¹, Liang Tongxiang², Wang Chen³, Dong Limin³

Affiliations

¹ Beijing Key Laboratory of Fine Ceramics, Institute of Nuclear and New Energy Technology, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China; State Key Lab of New Ceramic and Fine Processing, Tsinghua University, Beijing 100084, China. Electronic address: ljltsinghua@126.com.
² Beijing Key Laboratory of Fine Ceramics, Institute of Nuclear and New Energy Technology, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China; State Key Lab of New Ceramic and Fine Processing, Tsinghua University, Beijing 100084, China. Electronic address: txliang@mail.tsinghua.edu.cn.
³ Beijing Key Laboratory of Fine Ceramics, Institute of Nuclear and New Energy Technology, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China; State Key Lab of New Ceramic and Fine Processing, Tsinghua University, Beijing 100084, China.

PMID: 26952459
DOI: 10.1016/j.msec.2016.02.008

Abstract

The ultrafine grained 2205 duplex stainless steel was obtained by cold rolling and annealing. The tensile properties were investigated at room temperature. Comparing with coarse grained stainless steel, ultrafine grained sample showed higher strength and plasticity. In addition, grain size changed deformation orientation. The strain induced α'-martensite was observed in coarse grained 2205 duplex stainless steel with large strain. However, the grain refinement inhibited the transformation of α'-martensite;nevertheless, more deformation twins improved the strength and plasticity of ultrafine grained 2205 duplex stainless steel. In addition, the grain refinement improved corrosion resistance of the 2205 duplex stainless steel in sodium chloride solution.

Keywords: Corrosion; Duplex stainless steel; Grain refinement; Passive film; Tensile behaviour.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Corrosion
Dental Alloys / chemistry
Electrochemical Techniques
Microscopy, Electron, Transmission
Stainless Steel / chemistry*
Tensile Strength
X-Ray Diffraction

Substances

Dental Alloys
Martensite
Stainless Steel