Chattopadhyay, S and Anand, G and Ghosh Chowdhury, S and Manna, I (2018) Effect of reverse austenitic transformation on mechanical property and associated texture evolution in AISI 316 austenitic stainless steel processed by low temperature rolling and annealing. Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing, 734 (IF-4.014). pp. 139-148.
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The tensile behaviour of austenitic stainless steel after cryorolling and subsequent annealing has been reported. The defect structures generated during cryorolling, lead to the formation of alpha' and epsilon-martensite. Subsequent annealing leads to the formation of refined austenitic grains surrounded by martensitic islands. These martensitic islands consist of alpha' phase only. The dislocation-martensite interaction leads to discontinuous yielding for high Ultimate Tensile Strength (UTS)/Yield Strength (YS) ratio. In case of annealing at 923 K (650 degrees C) for 10 min after 30% cryorolling leads to nearly 30% untransformed martensite whereas only 7% martensite remains after annealing for 1 h. The effect of remnant martensite on tensile behaviour leading to yield plateau has been discussed in this work. It can be noticed that sample with 20% cryo rolling and annealed at 650 degrees C for 1 h shows higher YS (721 MPa) with YS/UTS ratio of 0.79 and similar to 18% uniform elongation. Sample with 30% cryo rolling and annealed at 650 degrees C for 1 h shows YS of 305 MPa with YS/UTS ratio of 0.27 and uniform elongation of similar to 24%. Therefore, 20% cryo rolled and annealed at 650 degrees C for 1 h has the best combination of mechanical properties.
|Uncontrolled Keywords:||Strain-Induced Martensite; Deformation-Induced Martensite; Quantitative Phase-Analysis; Ultrafine-Grained Metals; Variant Selection; Rietveld Method; Microstructure; Stability; Strength; Behavior|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||20 Sep 2019 14:46|
|Last Modified:||30 Sep 2019 14:08|
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