Microstructures, Mechanical Properties, and Strain Hardening Behavior of an Ultrahigh Strength Dual Phase Steel Developed by Intercritical Annealing of Cold-Rolled Ferrite/Martensite

2015 ◽  
Vol 46 (7) ◽  
pp. 3052-3062 ◽  
Author(s):  
Y. Mazaheri ◽  
A. Kermanpur ◽  
A. Najafizadeh
Keyword(s):  
Mechanical Properties ◽  
Strain Hardening ◽  
Dual Phase Steel ◽  
Intercritical Annealing ◽  
Dual Phase ◽  
Hardening Behavior ◽  
Ultrahigh Strength ◽  
Cold Rolled ◽  
Strain Hardening Behavior

Strain-Hardening Behavior of Dual-Phase Steel under Multistress States

2019 ◽  
Vol 28 (8) ◽  
pp. 4882-4893
Author(s):  
Yongsheng Xu ◽  
Wenjiao Dan ◽  
Chuang Ren ◽  
Weigang Zhang
Keyword(s):  
Strain Hardening ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Hardening Behavior ◽  
Strain Hardening Behavior

Effect of Intercritical Annealing Temperature on Development of Cold Rolled Dual Phase Steel from Q345 Steel

2013 ◽  
Vol 313-314 ◽  
pp. 693-696
Author(s):  
Ji Yuan Liu ◽  
Fu Xian Zhu ◽  
Shi Cheng Ma
Keyword(s):  
Dual Phase Steel ◽  
Annealing Temperature ◽  
Simulation Experiment ◽  
Intercritical Annealing ◽  
Continuous Annealing ◽  
Dual Phase ◽  
Automotive Applications ◽  
Treatment Procedure ◽  
Annealing Temperatures ◽  
Cold Rolled

Cold rolled dual phase steel was developed from Q345 steel by heat treatment procedure for automotive applications. The ultimate tensile strength was improved about 100MPa higher than the traditional cold-rolled Q345 steel in the continuous annealing simulation experiment. The microstructure presented varied characteristics in different intercritical annealing temperatures; mechanical properties were changed correspondingly as well. The chief discussions are focus on the recrystallization, hardenability of austenite and martensite transformation in the experiment.

scholarly journals Assessment of the Hardening Behavior and Tensile Properties of a Cold-Rolled Bainitic–Ferritic Steel

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6662
Author(s):  
Emilio Bassini ◽  
Antonio Sivo ◽  
Daniele Ugues
Keyword(s):  
Strain Hardening ◽  
High Strength ◽  
Dual Phase ◽  
Low Carbon ◽  
Soft Phase ◽  
Bending Tests ◽  
Ductile Materials ◽  
Hardening Behavior ◽  
Material State ◽  
Cold Rolled

The automotive field is continuously researching safer, high-strength, ductile materials. Nowadays, dual-phase (DP) steels are gaining importance, since they meet all these requirements. Dual-phase steel made of ferrite and bainite is the object of a complete microstructural and mechanical characterization, which includes tensile and bending tests. This specific steel contains ferrite and bainite in equal parts; ferrite is the soft phase while bainite acts as a dispersed reinforcing system. This peculiar microstructure, together with fine dispersed carbides, an extremely low carbon content (0.09 wt %), and a minimal degree of strain hardening (less than 10%) allow this steel to compete with traditional medium-carbon single-phase steels. In this work, a full pearlitic C67 steel containing 0.67% carbon was used as a benchmark to build a comparative study between the DP and SP steels. Moreover, the Crussard–Jaoul (C-J) and Voce analysis were adopted to describe the hardening behavior of the two materials. Using the C-J analysis, it is possible to separately analyze the ferrite and bainite strain hardening and understand which alterations occur to DP steel after being cold rolled. On the other hand, the Voce equation was used to evaluate the dislocation density evolution as a function of the material state.

Austenite formation during intercritical annealing in C-Mn cold-rolled dual phase steel

2015 ◽  
Vol 22 (4) ◽  
pp. 1203-1211 ◽  
Author(s):  
Sheng-ci Li ◽  
Yong-lin Kang ◽  
Guo-ming Zhu ◽  
Shuang Kuang
Keyword(s):  
Dual Phase Steel ◽  
Intercritical Annealing ◽  
Austenite Formation ◽  
Dual Phase ◽  
Cold Rolled

Correlation of microstructure and strain hardening behavior in the ultrafine-grained Nb-bearing dual phase steels

2016 ◽  
Vol 678 ◽  
pp. 215-226 ◽  
Author(s):  
A. Ghatei Kalashami ◽  
A. Kermanpur ◽  
E. Ghassemali ◽  
A. Najafizadeh ◽  
Y. Mazaheri
Keyword(s):  
Strain Hardening ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Hardening Behavior ◽  
Ultrafine Grained ◽  
Strain Hardening Behavior
Sign in / Sign up

Export Citation Format

Share Document