Effect of Strain Rate on the Columnar to Equiaxed Transition in an As-Cast Medium-Carbon Low-Alloy Steel during Hot Deformation

2019 ◽  
Author(s):  
K. Chadha ◽  
M. Jahazi ◽  
J. Spray
Keyword(s):  
Strain Rate ◽  
Alloy Steel ◽  
Hot Deformation ◽  
Low Alloy Steel ◽  
Medium Carbon ◽  
Columnar To Equiaxed Transition

scholarly journals Influence of strain rate on dynamic transformation of austenite in an as-cast medium-carbon low-alloy steel

Materialia ◽  
2018 ◽  
Vol 1 ◽  
pp. 155-167 ◽  
Author(s):  
K. Chadha ◽  
Z. Ahmed ◽  
C. Aranas ◽  
D. Shahriari ◽  
M. Jahazi
Keyword(s):  
Strain Rate ◽  
Alloy Steel ◽  
Low Alloy Steel ◽  
Medium Carbon ◽  
Dynamic Transformation

Hot Deformation and Processing Maps of a High Strength Alloy Steel

2010 ◽  
Vol 97-101 ◽  
pp. 374-377 ◽  
Author(s):  
Yong Cheng Lin ◽  
Ge Liu
Keyword(s):  
Strain Rate ◽  
Alloy Steel ◽  
Power Dissipation ◽  
Hot Deformation ◽  
High Strength ◽  
Strain Rate Range ◽  
Strain Rates ◽  
Low Alloy Steel ◽  
Average Grain Size ◽  
Forming Temperature

The hot deformation behaviors of a high strength low alloy steel have been studied using the processing map technique, which is based on the variations of efficiency of power dissipation with forming temperatures and strain rates. The results show that: (1) The average grain size of the deformed alloy steel increases with the increase of forming temperatures and decreases with the increase of strain rates. (2) The efficiency of power dissipation increases as the forming temperature is increased. However, the efficiency of power dissipation changes with strain rates in the form of bulgy parabola, and the maximum value exists at the strain rate of 0.1 . (3) A domain for reasonable dynamic recrystallization (DRX) exists in the temperature range of (1050–1150) and strain rate range of (0.01–3) , with its peak efficiency of 32% at about 1140 °C and 0.23 , which are the optimum hot working parameters for the studied high strength low alloy steel.

Hot deformation simulation of modified AISI 5120 low alloy steel

2017 ◽  
Author(s):  
Diego Boschetti ◽  
Ana Paola Braga ◽  
Paula Fernanda da Silva Farina
Keyword(s):  
Alloy Steel ◽  
Hot Deformation ◽  
Low Alloy Steel ◽  
Deformation Simulation

Study on High Temperature Flow Stress Model of As-cast SA508-3 Low Alloy Steel

2020 ◽  
Vol 831 ◽  
pp. 25-31
Author(s):  
Pan Fei Fan ◽  
Jian Sheng Liu ◽  
Hong Ping An ◽  
Li Li Liu
Keyword(s):  
High Temperature ◽  
Flow Stress ◽  
Strain Rate ◽  
Alloy Steel ◽  
Flow Behavior ◽  
Peak Stress ◽  
Stress Model ◽  
Low Alloy Steel ◽  
Two Stage ◽  
Flow Stress Model

In order to obtain the high temperature flow behavior of as-cast SA508-3 low alloy steel, the stress-strain curves of steel are obtained by Gleeble thermal simulation compression test at deformation temperature 800°C-1200°C and strain rate 0.001s-1-1s-1. Based on Laasraoui two-stage flow stress model, a high temperature flow stress model is established by multiple linear regression method. The results show that the peak stress characteristics are not obvious at low temperature and high strain rate, which is a typical dynamic recovery characteristic. Meanwhile, the peak stress characteristics are obvious at high temperature and low strain rate, which is a typical dynamic recrystallization characteristic. By means of the comparisons between experiments and calculations, the Laasraoui two-stage flow stress model can truly reflect flow behavior of steel at high temperature, which provides theoretical guidance for the hot deformation of the steel.

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