Dependence of austenite stability and deformation behavior on tempering time in an ultrahigh strength medium Mn TRIP steel

2018 ◽  
Vol 738 ◽  
pp. 153-162 ◽  
Author(s):  
Naipeng Zhou ◽  
Renbo Song ◽  
Xuan Li ◽  
Jiajia Li
Keyword(s):  
Trip Steel ◽  
Deformation Behavior ◽  
Austenite Stability ◽  
Ultrahigh Strength ◽  
Strength Medium ◽  
Tempering Time

Effect of retained austenite stability on cyclic deformation behavior of low‐alloy transformation‐induced plasticity steels

2019 ◽  
Vol 42 (5) ◽  
pp. 1085-1099 ◽  
Author(s):  
Peter I. Christodoulou ◽  
Alexis T. Kermanidis ◽  
Gregory N. Haidemenopoulos ◽  
Daniel Krizan ◽  
Kyriaki Polychronopoulou
Keyword(s):  
Cyclic Deformation ◽  
Deformation Behavior ◽  
Retained Austenite ◽  
Transformation Induced Plasticity ◽  
Austenite Stability ◽  
Retained Austenite Stability

In Situ Transmission Electron Microscopy Investigation of the Deformation Behavior of Cu with Nanoscale Twins

2009 ◽  
Vol 633-634 ◽  
pp. 63-72 ◽  
Author(s):  
Y. B. Wang ◽  
M.L. Sui
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Deformation Behavior ◽  
Emission Sources ◽  
Dislocation Emission ◽  
Ultrahigh Strength ◽  
Transmission Electron ◽  
Microscopy Investigation ◽  
Electron Microscopy Investigation

This paper reviews our recent studies on the effect of twin boundary (TB) on the deformation behavior in Cu with nanoscale growth twins. In situ straining transmission electron microscopy investigations on TB migration, TBs and twin ends acting as dislocation emission sources, and the interactions between dislocations and TBs are highlighted. Results provide some useful understanding of why Cu with nanoscale twins leads to a combination of ultrahigh strength and high ductility.

A STUDY ON IMPACT DEFORMATION AND TRANSFORMATION BEHAVIOR OF TRIP STEEL BY FINITE ELEMENT SIMULATION AND EXPERIMENT

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5985-5990 ◽  
Author(s):  
TAKESHI IWAMOTO ◽  
TOSHIYUKI SAWA ◽  
MOHAMMED CHERKAOUI
Keyword(s):  
Finite Element ◽  
Martensitic Transformation ◽  
Finite Element Simulation ◽  
Trip Steel ◽  
Deformation Behavior ◽  
Implicit Time ◽  
Transformation Behavior ◽  
Impact Deformation ◽  
Element Simulation ◽  
The Impact

Due to strain-induced martensitic transformation (SIMT), the strength, ductility and toughness of TRIP steel are enhanced. The impact deformation behavior of TRIP steel is very important because it is investigated to apply it for the shock absorption member in automobile industries. However, its behavior is still unclear since it is quite difficult to capture the transformation behavior inside the materials. There are some opinions that the deformation characteristics are not mainly depending on the martensitic transformation due to heat generation by plastic work. Here, the impact compressive deformation behavior of TRIP steel is experimentally studied by Split Hopkinson Pressure Bar (SHPB) method at room temperature. In order to catch SIMT behavior during impact deformation, volume resistivity is measured and a transient temperature is captured by using a quite thin thermocouple. Then, a finite element simulation with the constitutive model for TRIP steel is performed. The finite element equation can be derived from the rate form of principle of virtual work based on the implicit time integration scheme. Finally, the results between the computation and experiment are compared to confirm the validity of computational model.

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