A new fcc-bcc orientation relationship observed in the strain-induced martensitic transformation of an austenitic stainless steel

2021 ◽  
pp. 130735
Author(s):  
Yinsheng He ◽  
Jianbing Gao ◽  
Yizhu He ◽  
Keesam Shin
Keyword(s):  
Stainless Steel ◽  
Martensitic Transformation ◽  
Austenitic Stainless Steel ◽  
Orientation Relationship

Variant Selection in Austenitic Stainless Steel Samples after Cold Rolling and Tension Deformation

2011 ◽  
Vol 172-174 ◽  
pp. 55-60
Author(s):  
Hamilton F.G. Abreu ◽  
Nathanael Morais ◽  
Flavio Herculando ◽  
Marcelo Gomes Da Silva ◽  
Alex Nascimento
Keyword(s):  
Stainless Steel ◽  
Martensitic Transformation ◽  
Austenitic Stainless Steel ◽  
Cold Rolling ◽  
Orientation Relationship ◽  
Electron Backscatter Diffraction ◽  
Austenitic Stainless Steels ◽  
Martensite Phase ◽  
Variant Selection ◽  
Orientation Relationships

The deformation process can induce the precipitation of martensite in austenitic stainless steels. When shear stress is applied at temperatures near Ms, displacive transformation (martensitic transformation) mode is activated. When external stresses are applied, the work done contributes to a change in free energy either raising or lowering the Ms-temperature. Orientation relationships during austenite to martensite phase transformation were investigated in an austenitic stainless steel samples deformed by cold rolling and deformed in a tension test. EBSD (electron backscatter diffraction) and X-ray diffraction techniques were used to evaluate parent austenite texture and martensite texture after transformation. The observed orientation relationship between austenite and martensite was compared with the predicted orientation relationship by the phenomenological theory of martensite crystallography (PMTC). Aspects related to variant selection were discussed based on the criterion for the action of applied stress in the martensitic transformation postulated by Patel and Cohen. Results showed a very good agreement between measured and calculated results.

New orientation relationship in martensitic transformation in austenitic stainless steel welded explosively

1978 ◽  
Vol 36 (1) ◽  
pp. 632-633
Author(s):  
T. Yamashita ◽  
T. Onzawa
Keyword(s):  
Plastic Deformation ◽  
High Pressure ◽  
Stainless Steel ◽  
Martensitic Transformation ◽  
Austenitic Stainless Steel ◽  
Orientation Relationship ◽  
Martensitic Transformations ◽  
Steel Plates ◽  
Orientation Relationships ◽  
Rapid Plastic Deformation

Martensitic transformation induced by plastic deformation in 18/8 stainless steel has been extensively investigated by many workers. Venablel has proposed that the orientation relationships in transformations are (111)γ// (00.1)ε// (011)α and [101]γ//[11.0]ε//[lll]α. Since metals welded explosively or shock loaded are subjected to rapid plastic deformation under a high pressure, the aspects of martensitic transformations are expected to be different from those reported hitherto. The purpose of the present experiment is to show the new orientation relationship in transformation and the new aspects of transformations in 18/8 stainless steel welded explosively as well as shock loaded. The atomic movements required in transformation are also considered.Austenitic stainless steel plates, 3×50×200 mm, were heated in vacuum at about 700°C for 30 min to transform existing ε and α phases into γ phase. They were welded explosively by using two kinds of explosives with detonation velocities of 2,400 m/s and 5,000 m/s.

Effect of martensitic transformation on springback behavior of 304L austenitic stainless steel

2017 ◽  
Vol 4 (9) ◽  
pp. 096510 ◽  
Author(s):  
H Fathi ◽  
H R Mohammadian Semnani ◽  
E Emadoddin ◽  
B Mohammad Sadeghi
Keyword(s):  
Stainless Steel ◽  
Martensitic Transformation ◽  
Austenitic Stainless Steel ◽  
Springback Behavior
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