An Experimental Study of Springback for Dual Phase Steel and Conventional High Strength Steel

2001 ◽  
Author(s):  
Aleksy A. Konieczny ◽  
Ming F. Shi ◽  
Changqing Du
Keyword(s):  
Experimental Study ◽  
High Strength Steel ◽  
Dual Phase Steel ◽  
High Strength ◽  
Dual Phase

The Study in Improvement of Hole Expansibility for High-Strength Steel of 980MPa Grade

2018 ◽  
Vol 941 ◽  
pp. 492-497
Author(s):  
Kuo Cheng Yang ◽  
J.F. Tu ◽  
L.J. Chiang ◽  
W.J. Cheng ◽  
C.Y. Huang
Keyword(s):  
Yield Strength ◽  
High Strength Steel ◽  
Dual Phase Steel ◽  
Single Phase ◽  
High Strength ◽  
Expansion Ratio ◽  
High Yield ◽  
Dual Phase ◽  
Hole Expansion ◽  
Hole Expansion Ratio

Recently, due to the requirements of lightweight and safety, the grade of 980MPa high-strength steel has the demand of high hole expansibility and high yield strength. Due to the large difference of hardness between the soft ferrite and hard martensite, the traditional DP980Y dual phase steel has poor hole expansibility. In order to improve the hole expansibility of DP980Y dual phase steel, the best way is to modify the microstructure into a single-phase to eliminate the large difference of hardness. In this paper, the steel of nearly full bainite microstructure with small amount of ferrite and M/A constituents was studied. Compared to the DP980Y dual phase steel, it was found that this modified steel with a single-phase microstructure has the same grade of 980MPa of tensile strength, but can achieve the demand of higher yield strength and hole-expansion ratio. This study shows reducing the amount of ferrite can increase the homogeneity of matrix with the single phase to improve the hole expansibility. In addition, the use of lower bainite transformation temperature and lower carbon content has the higher hole-expansion ratio due to the less amount of M/A constituents.

Experimental Study on Laser Thermal Stress Forming of High Strength Steel

2015 ◽  
Vol 35 (s1) ◽  
pp. s114008
Author(s):  
伍强 Wu Qiang ◽  
徐兰英 Xu Lanying ◽  
杨永强 Yang Yongqiang ◽  
孔春玉 Kong Chunyu
Keyword(s):  
Experimental Study ◽  
Thermal Stress ◽  
High Strength Steel ◽  
High Strength

scholarly journals A high-strength heterogeneous structural dual-phase steel

2019 ◽  
Vol 54 (19) ◽  
pp. 12898-12910 ◽  
Author(s):  
Bo Gao ◽  
Xuefei Chen ◽  
Zhiyi Pan ◽  
Jiansheng Li ◽  
Yan Ma ◽  
...  
Keyword(s):  
Dual Phase Steel ◽  
High Strength ◽  
Dual Phase
Sign in / Sign up

Export Citation Format

Share Document