Microstructural evolution and strain hardening behavior of a novel two-stage warm rolled ultra-high strength medium Mn steel with heterogeneous structures

2022 ◽  
pp. 103212
Author(s):  
Yuming Zou ◽  
Hua Ding ◽  
Yu Zhang ◽  
Zhengyou Tang
Keyword(s):  
Strain Hardening ◽  
Microstructural Evolution ◽  
High Strength ◽  
Two Stage ◽  
Hardening Behavior ◽  
Medium Mn Steel ◽  
Heterogeneous Structures ◽  
Strain Hardening Behavior ◽  
Mn Steel ◽  
Strength Medium

Strain Hardening Behavior Prediction Model For Automotive High Strength Multiphase Steels

2015 ◽  
Vol 86 (12) ◽  
pp. 1574-1582 ◽  
Author(s):  
Antonella Dimatteo ◽  
Valentina Colla ◽  
Gianfranco Lovicu ◽  
Renzo Valentini
Keyword(s):  
Prediction Model ◽  
Strain Hardening ◽  
High Strength ◽  
Behavior Prediction ◽  
Hardening Behavior ◽  
Strain Hardening Behavior ◽  
Multiphase Steels

Microstructural evolution and strain-hardening behavior of multi-pass caliber-rolled Ti–13Nb–13Zr

2015 ◽  
Vol 648 ◽  
pp. 359-366 ◽  
Author(s):  
Taekyung Lee ◽  
Kyung-Tae Park ◽  
Dong Jun Lee ◽  
Jiwon Jeong ◽  
Sang Ho Oh ◽  
...  
Keyword(s):  
Strain Hardening ◽  
Microstructural Evolution ◽  
Hardening Behavior ◽  
Strain Hardening Behavior

Influence of Various Precipitate Phases on Tensile Properties of an Extruded Mg-Y-Nd Alloy

2014 ◽  
Vol 788 ◽  
pp. 17-22 ◽  
Author(s):  
Bo Song ◽  
Ren Long Xin ◽  
Gang Chen ◽  
Ke Zeng ◽  
Guang Jie Huang ◽  
...  
Keyword(s):  
Yield Strength ◽  
Strain Hardening ◽  
Tensile Properties ◽  
Precipitation Hardening ◽  
High Strength ◽  
Age Hardening ◽  
Hardening Behavior ◽  
Initial Stage ◽  
Strain Hardening Behavior ◽  
Strain Hardening Rate

The high strength of Mg-Y-Nd alloy has been achieved primarily by precipitation hardening. Therefore, it is important to investigate the influence of various precipitate phases on the tensile properties of Mg-Y-Nd alloys. In this study, an extruded Mg-Y-Nd alloy was aged at various temperatures to examine the hardening behaviors. The results showed that the as-extruded alloy exhibited remarkable age hardening response at 210°C due to the precipitation of β’, and slight hardening response at 150°C and 280°C due to the precipitation of β’’ and β, respectively. Furthermore, different precipitates exerted different effects on the tensile properties. In comparison with the as-extruded alloy, the yield strength of the alloys aged at 210 °C and 150 °C was increased by 21 MPa and 8 MPa, respectively, whereas the yield strength of the alloy aged at 280°C was decreased by 30 MPa. The elongation of the alloy aged at 210°C and 150°C was also largely reduced by 3.4% and 2.9%, respectively, while the elongation of the alloy aged at 280°C was only slightly reduced (6.3%). Moreover, compared with the as-extruded alloy, the alloy aged at 210°C and 150°C exhibited lower hardening capacity and higher strain hardening rate at the initial stage, but the strain hardening rate decreased more quickly with the increasing stress. The alloy aged at 280°C exhibited similar strain hardening behavior with the as-extruded alloy. The results in this study provide guidelines for determining the heat treatment parameters for the Mg-Y-Nd alloys to improve their tensile properties.

scholarly journals Extraordinary Room-Temperature Tensile Ductility of Pure Magnesium

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3813
Author(s):  
Du ◽  
Chang ◽  
Chen ◽  
Huo ◽  
Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Strain Hardening ◽  
Microstructural Evolution ◽  
Room Temperature ◽  
Tensile Ductility ◽  
True Strain ◽  
Tensile Behavior ◽  
Deformation Mechanisms ◽  
Hardening Behavior ◽  
Strain Hardening Behavior

Room-temperature tensile behavior and associated deformation mechanisms of multiple-axial forged (MAFed) pure Mg has been investigated. The as-MAFed Mg, with a coarsely recrystallized structure, exhibited a balanced strain-hardening behavior with strain, resulting in extraordinary mechanical properties with high ultimate stress (~200 MPa) and extensive true strain (~0.30). The observation on the microstructural evolution suggests that the balanced strain-hardening behavior is correlated with de-twinning behavior cooperated with pyramidal <c + a> dislocations at the plastic straining stage.

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