Deformation Induced Martensitic Transformation and Its Initial Microstructure Dependence in a High Alloyed Duplex Stainless Steel. Issue 12 (1st August 2017)

• Record Type: Journal Article
• Authors: Xie, Lin; Huang, Tian‐Lin; Wang, Yu‐Hui; Wu, Gui‐Lin; Tsuji, Nobuhiro; Huang, Xiao‐Xu
• Is Part Of: Steel research international. Volume 88:Issue 12(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-08-01
• Subjects: cold rolling -- deformation induced martensitic transformation -- duplex stainless steel -- microstructure; Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.201700169
• Languages: English
• ISSNs: 1611-3683

Abstract

Abstract : Deformation induced martensitic transformation (DIMT) usually occurs in metastable austenitic stainless steels. Recent studies have shown that DIMT may occur in the austenite phase of low alloyed duplex stainless steels. The present study demonstrates that DIMT can also take place in a high alloyed Fe–23Cr–8.5Ni duplex stainless steel, which exhibits an unexpectedly rapid transformation from γ ‐austenite into α′ ‐martensite. However, an inhibited martensitic transformation has been observed by varying the initial microstructure from a coarse alternating austenite and ferrite band structure to a fine equiaxed microduplex structure. Abstract : Different initial microstructures in a duplex stainless steel are produced with different morphologies and size scales of austenite. A more rapid evolution of deformation induced martensitic transformation (DIMT) occurs in coarse austenite bands than in fine austenite particles, which offers a new scope for controlling the DIMT without changing the chemical composition.