Martensitic transformation in a high purity austenitic steel during low cycle torsion fatigue test

2003 ◽  
Vol 91 ◽  
pp. 96-100
Author(s):  
Jacques Stolarz ◽  
Antoni Lara
Keyword(s):  
Martensitic Transformation ◽  
Austenitic Steel ◽  
Fatigue Test ◽  
High Purity

scholarly journals Effect of Thermomechanical Cycling on Martensitic Transformation and Shape Memory Effect in 304 Austenitic Steel

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 901
Author(s):  
Jie Chen ◽  
Yonghao Zhang ◽  
Jiqiang Ge ◽  
Huabei Peng ◽  
Shuke Huang ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory ◽  
Austenitic Steel ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Annealing Temperature ◽  
Cycle Number ◽  
Thermomechanical Cycling ◽  
Ε Martensite ◽  
Optimum Annealing Temperature

To improve the shape memory effect (SME) of 304 austenitic steel effectively and efficiently, thermomechanical cycling, comprising deformation at room temperature and annealing, was applied. The influences of cycle number and annealing temperature on the SME and microstructures in 304 austenitic steel were investigated by light microscope (LM), X-ray diffraction (XRD), and transmission electron microscope (TEM). The shape recovery ratio was remarkably improved from 16% to 40% after two thermomechanical cycles. The optimum annealing temperature was 833 K in the process of thermomechanical cycling. The improved SME by thermomechanical cycling was mainly related to stress-induced ε martensite rather than stress-induced α’ martensite. The reason is that thermomechanical cycling can not only promote the occurrence of the stress-induced γ→ε martensitic transformation, but also suppress the subsequently stress-induced ε→α′ transformation.

Reversible Martensitic Transformation Produced by Severe Plastic Deformation of Metastable Austenitic Steel

2013 ◽  
Vol 738-739 ◽  
pp. 491-495 ◽  
Author(s):  
Igor Litovchenko ◽  
Alexander Tyumentsev ◽  
Alexander V. Korznikov
Keyword(s):  
Plastic Deformation ◽  
High Pressure ◽  
Martensitic Transformation ◽  
Severe Plastic Deformation ◽  
Dynamic Recrystallization ◽  
Austenitic Steel ◽  
High Pressure Torsion ◽  
Martensitic Transformations ◽  
Metastable Austenitic Steel ◽  
Nanostructured States

The peculiarities of martensitic transformations and formation of nanostructured states in metastable austenitic steel (Fe-18Cr-8Ni-Ti) after severe plastic deformation by high pressure torsion are investigated. It is shown that during severe plastic deformation with increased strain rate not only direct (γ→α΄) but also reverse (α΄→γ) martensitic transformations occur, which is revealed by the changes in the volume content of α΄ - martensite during deformation. The fragments thought to be formed by direct and reverse martensitic transformations and those of dynamic recrystallization of austenite are observed.

Deformation-induced martensitic transformation in a 201 austenitic steel: The synergy of stacking fault energy and chemical driving force

2016 ◽  
Vol 653 ◽  
pp. 147-152 ◽  
Author(s):  
M. Moallemi ◽  
A. Kermanpur ◽  
A. Najafizadeh ◽  
A. Rezaee ◽  
H. Samaei Baghbadorani ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Austenitic Steel ◽  
Driving Force ◽  
Stacking Fault ◽  
Stacking Fault Energy

Microstructure and martensitic transformation in 316L austenitic steel during multiaxial low cycle fatigue at room temperature

2019 ◽  
Vol 767 ◽  
pp. 138407 ◽  
Author(s):  
Veronika Mazánová ◽  
Milan Heczko ◽  
Viktor Škorík ◽  
Alice Chlupová ◽  
Jaroslav Polák ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Austenitic Steel ◽  
Room Temperature ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue

The Observation of Austenite to Ferrite Martensitic Transformation in an Fe-Mn-Al Austenitic Steel after Cooling from High Temperature

2016 ◽  
Vol 879 ◽  
pp. 335-338 ◽  
Author(s):  
Wei Chun Cheng ◽  
Kun Hsien Lee ◽  
Shu Mao Lin ◽  
Shao Yu Chien
Keyword(s):  
Martensitic Transformation ◽  
Phase Transformations ◽  
Austenitic Steel ◽  
Lath Martensite ◽  
Equilibrium Phase ◽  
Stable Phase ◽  
Air Cooling ◽  
Trip Steels ◽  
Heating And Cooling ◽  
Austenite Grains

Fe-Mn-Al steels with low density have the potential to substitute for TRIP (transformation induced plasticity) steels. For the development of Fe-Mn-Al TRIP steels, phase transformations play an important role. Our methods of studying the phase transformations of the Fe-16.7 Mn-3.4 Al (wt%) austenitic steel include heating and cooling. We have studied the martensitic transformation of the ternary Fe-Mn-Al steel. Single austenite phase is the equilibrium phase at 1373 K, and dual phases of ferrite and austenite are stable at low temperatures. It is noteworthy that lath martensite forms in the prior austenite grains after cooling from 1373 K via quenching, air-cooling, and/or furnace-cooling. The crystal structure of the martensite belongs to body-centered cubic. The formation mechanism of the ferritic martensite is different from the traditional martensite in steels. Ferrite is the stable phase at low temperature.

scholarly journals Variant Selection in Mechanically-induced Martensitic Transformation of Metastable Austenitic Steel

2005 ◽  
Vol 45 (8) ◽  
pp. 1217-1219 ◽  
Author(s):  
Seung Hyun LEE ◽  
Jun-Yun KANG ◽  
Heung Nam HAN ◽  
Kyu Hwan OH ◽  
Hu-Chul LEE ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Austenitic Steel ◽  
Variant Selection ◽  
Metastable Austenitic Steel
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