Hot deformation characterization of ultrahigh strength stainless steel through processing maps generated using different instability criteria

2017 ◽  
Vol 131 ◽  
pp. 480-491 ◽  
Author(s):  
Xiaohui Wang ◽  
Zhenbao Liu ◽  
Haiwen Luo
Keyword(s):  
Stainless Steel ◽  
Hot Deformation ◽  
Processing Maps ◽  
Ultrahigh Strength ◽  
Instability Criteria

Characterization of Hot Deformation Behavior and Processing Maps of Ti–19Al–22Mo Alloy

2019 ◽  
Vol 25 (4) ◽  
pp. 1063-1071 ◽  
Author(s):  
P. L. Narayana ◽  
Cheng-Lin Li ◽  
Jae-Keun Hong ◽  
Seong-Woo Choi ◽  
Chan Hee Park ◽  
...  
Keyword(s):  
Hot Deformation ◽  
Deformation Behavior ◽  
Processing Maps ◽  
Hot Deformation Behavior

scholarly journals Hot-Deformation Behavior and Hot-Processing Maps of AISI 410 Martensitic Stainless Steel

2016 ◽  
Vol 35 (9) ◽  
pp. 929-940
Author(s):  
Rong-Sheng Qi ◽  
Miao Jin ◽  
Bao-Feng Guo ◽  
Xin-Gang Liu ◽  
Lei Chen
Keyword(s):  
Stainless Steel ◽  
High Temperatures ◽  
Hot Deformation ◽  
Martensitic Stainless Steel ◽  
Ferrite Content ◽  
Optimum Process ◽  
Processing Maps ◽  
Delta Ferrite ◽  
Deformation Behaviors ◽  
Measured Flow

AbstractThe compressive deformation behaviors of 410 martensitic stainless steel were investigated on a Gleeble-1500 thermomechanical simulator, and the experimental stress–strain data were obtained. The measured flow stress was corrected for friction and temperature. A constitutive equation that accounts for the influence of strain was established, and the hot-processing maps at different strain were plotted. The microstructure evolution of the hot-deformation process was studied on the basis of microstructural observations at high temperatures. Phase-transformation experiments on 410 steel were conducted at high temperatures to elucidate the effects of temperature on the delta-ferrite content. The initial forging temperature and optimum process parameters were obtained on the basis of the processing map and the changes in the delta-ferrite content at high temperatures.

scholarly journals Effect of Nitrogen Content on Hot Deformation Behavior and Grain Growth in Nuclear Grade 316LN Stainless Steel

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Ming-wei Guo ◽  
Zhen-hua Wang ◽  
Ze-an Zhou ◽  
Shu-hua Sun ◽  
Wan-tang Fu
Keyword(s):  
Stainless Steel ◽  
Dynamic Recrystallization ◽  
Strain Rate ◽  
Grain Growth ◽  
Strain Rate Sensitivity ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Rate Sensitivity ◽  
Processing Maps ◽  
Hot Deformation Behavior

316LN stainless steel with 0.08%N (08N) and 0.17%N (17N) was compressed at 1073–1473 K and 0.001–10 s−1. The hot deformation behavior was investigated using stress-strain curve analysis, processing maps, and so forth. The microstructure was analyzed through electron backscatter diffraction analysis. Under most conditions, the deformation resistance of 17N was higher than that of 08N. This difference became more pronounced at lower temperatures. The strain rate sensitivity increased with increasing temperature for types of steel. In addition, the higher the N content, the higher the strain rate sensitivity. Hot deformation activation energy increased from 487 kJ/mol to 549 kJ/mol as N concentration was increased from 0.08% to 0.17%. The critical strain for initiation of dynamic recrystallization was lowered with increasing N content. In the processing maps, both power dissipation ratio and unstable region increased with increasing N concentration. In terms of microstructure evolution, N promoted dynamic recrystallization kinetic and decreased dynamic recrystallization grain size. The grain growth rate was lower in 17N than in 08N during heat treatment. Finally, it was found that N favored twin boundary formation.

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