scholarly journals Effect of Heat-Treatment Schedule on the Microstructure and Mechanical Properties of Cold-Rolled Dual-Phase Steels

2015 ◽  
Vol 28 (9) ◽  
pp. 1141-1148 ◽  
Author(s):  
Yong-Gang Deng ◽  
Hong-Shuang Di ◽  
Jie-Cen Zhang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Schedule ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Microstructure And Mechanical Properties ◽  
Cold Rolled ◽  
Heat Treatment Schedule

Effect of Microalloying Elements on Phase Transformation, Microstructure and Mechanical Properties in Dual-Phase Steels

2016 ◽  
Vol 879 ◽  
pp. 483-488
Author(s):  
Ekaterina Bocharova ◽  
Kirill Khlopkov ◽  
Roland Sebald
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
Strong Influence ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Rolled Material ◽  
Microstructure And Mechanical Properties ◽  
Cold Rolled ◽  
Microalloying Elements ◽  
Hot Rolled

Dual-phase steels are the most important AHSS grades for automotive applications. Microalloying elements such as Ti, Nb or B are widely used to improve the strength of dual-phase steels. Thus, understanding the influence of these elements on the microstructure and mechanical properties of dual-phase steels along the processing route is critical for the development of new steel grades. In this work, different microalloying elements were investigated, separately or in combination. The influences of the different elements on the microstructure and mechanical properties of dual-phase steels in the hot-rolled condition and after annealing of cold-rolled material. Dilatometer measurements were performed to investigate phase transformation during a typical continuous annealing treatment of dual-phase steel after cold rolling. It was shown that, for example, Ti has a strong influence on the mechanical properties of hot-rolled material while its influence on annealed materials after cold rolling was relatively small. Conversely, B had a strong influence on cold-rolled materials but an insignificant influence on hot-rolled materials.

Influence of Heat Treatment Schedule on the Tensile Properties and Wear Behavior of Dual Phase Steels

2016 ◽  
Vol 88 (4) ◽  
pp. 1600213 ◽  
Author(s):  
Hamid Ashrafi ◽  
Sorour Sadeghzade ◽  
Rahmatollah Emadi ◽  
Morteza Shamanian
Keyword(s):  
Heat Treatment ◽  
Tensile Properties ◽  
Wear Behavior ◽  
Treatment Schedule ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Heat Treatment Schedule

scholarly journals Effect of Heat Treatment on Microstructure and Mechanical Properties of New Cold-Rolled Automotive Steels

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1414
Author(s):  
Fei Huang ◽  
Jian Chen ◽  
Zhangqi Ge ◽  
Junliang Li ◽  
Yongqiang Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Testing Machine ◽  
Second Phase ◽  
Isothermal Heat Treatment ◽  
Austenitizing Temperature ◽  
Austenite Grain Size ◽  
Austenite Grain ◽  
Microstructure And Mechanical Properties ◽  
Cold Rolled

The effect of austenitizing temperature and aging treatment on the microstructure and mechanical properties of two new cold-rolled automotive steel plates (20Mn2Cr and 20Mn2CrNb) was investigated by using isothermal heat treatment, optical microscope, scanning electron microscope, microhardness tester, and tensile testing machine. The results show that as the austenitizing temperature increased, the original austenite grain sizes of both steels increased. The original austenite grain size of 20Mn2CrNb was smaller than that of 20Mn2Cr. The microhardness of 20Mn2CrNb gradually decreased with increasing aging temperature, while the hardness of 20Mn2Cr varied irregularly. The mechanical properties of 20Mn2Cr were better than those of 20Mn2CrNb under the same heat-treatment process. The effect of heat treatment on microstructure and mechanical properties was related to the martensite content, dislocation density, and precipitation of second-phase particles.

scholarly journals Effect of Silicon Content on the Microstructure and Mechanical Properties of Dual-Phase Steels

2012 ◽  
Vol 1 (5) ◽  
pp. 217-223 ◽  
Author(s):  
J. Drumond ◽  
O. Girina ◽  
J. F. da Silva Filho ◽  
N. Fonstein ◽  
C. A. Silva de Oliveira
Keyword(s):  
Mechanical Properties ◽  
Silicon Content ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Microstructure And Mechanical Properties

Effects of Gd on the microstructure and mechanical properties of Mg–Li dual-phase alloys

2020 ◽  
Vol 111 (5) ◽  
pp. 432-438
Author(s):  
Na Zhang ◽  
Hanwu Dong ◽  
Limin Wang ◽  
Renju Cheng ◽  
Jun Zhan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Dual Phase ◽  
Grain Refining ◽  
Refining Effect ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Alloy Heat ◽  
Strength Alloy

Abstract Gadolinium (Gd) (up to 10 wt.%) was added to Mg-7Li dual-phase alloys, and the Gd-containing alloys were heat-treated for 3 h at 698 -748 K. The microstructure and mechanical properties of the as-cast and heat-treated alloys were then examined. The results indicated that the addition of Gd introduced the Mg3Gd phase into the duplex Mg-7Li alloy, containing a-Mg and b-Li phases. Gd also refined the grains, and the addition of 8 wt.% Gd resulted in the highest grain refining effect. The Gd atoms in the a-Mg phase, as well as precipitates in b-Li matrixes and at the surface of the a-Mg phase, strengthened the alloys. The highest strength alloy was obtained after the addition of 6 wt.% Gd, with tensile and compressive yield strengths of 143- 147 MPa, about twice as those of the Mg-7Li alloy. Heat treatment, which was found to be optimum at 723 K for 3 h, can decrease both the amount of precipitate and the hardness of the alloy, but not the amount of the Mg3Gd phase.

Sign in / Sign up

Export Citation Format

Share Document