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Title: Influence of Manufacturing Processes and Microstructures on the Performance and Manufacturability of Advanced High Strength Steels

Abstract

Advanced high strength steels (AHSS) are performance-based steel grades and their global material properties can be achieved with various steel chemistries and manufacturing processes, leading to various microstructures. In this paper, we investigate the influence of supplier variation and resulting microstructure difference on the overall mechanical properties as well as local formability behaviors of advanced high strength steels (AHSS). For this purpose, we first examined the basic material properties and the transformation kinetics of TRansformation Induced Plasticity (TRIP) 800 steels from three different suppliers under different testing temperatures. The experimental results show that there is a significant supplier (i.e., manufacturing process) dependency of the TRIP 800 steel mechanical and microstructure properties. Next, we examined the local formability of two commercial Dual Phase (DP) 980 steels during stamping process. The two commercial DP 980 steels also exhibit noticeably different formability during stamping process in the sense that one of them shows severe tendency for shear fracture. Microstructure-based finite element analyses are carried out next to simulate the localized deformation process with the two DP 980 microstructures, and the results suggest that the possible reason for the difference in formability lies in the morphology of the hard martensite phase in the DPmore » microstructure.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
974476
Report Number(s):
PNNL-SA-64625
VT0505000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Transactions of the ASME. Journal of Engineering Materials and Technology, 131(4):Article Number: 041205
Additional Journal Information:
Journal Name: Transactions of the ASME. Journal of Engineering Materials and Technology, 131(4):Article Number: 041205
Country of Publication:
United States
Language:
English
Subject:
TRIP steel; DP steel; microstructure; material property; formability; shear fracture

Citation Formats

Choi, Kyoo Sil, Liu, Wenning N, Sun, Xin, and Khaleel, Mohammad A. Influence of Manufacturing Processes and Microstructures on the Performance and Manufacturability of Advanced High Strength Steels. United States: N. p., 2009. Web. doi:10.1115/1.3183778.
Choi, Kyoo Sil, Liu, Wenning N, Sun, Xin, & Khaleel, Mohammad A. Influence of Manufacturing Processes and Microstructures on the Performance and Manufacturability of Advanced High Strength Steels. United States. doi:10.1115/1.3183778.
Choi, Kyoo Sil, Liu, Wenning N, Sun, Xin, and Khaleel, Mohammad A. Thu . "Influence of Manufacturing Processes and Microstructures on the Performance and Manufacturability of Advanced High Strength Steels". United States. doi:10.1115/1.3183778.
@article{osti_974476,
title = {Influence of Manufacturing Processes and Microstructures on the Performance and Manufacturability of Advanced High Strength Steels},
author = {Choi, Kyoo Sil and Liu, Wenning N and Sun, Xin and Khaleel, Mohammad A},
abstractNote = {Advanced high strength steels (AHSS) are performance-based steel grades and their global material properties can be achieved with various steel chemistries and manufacturing processes, leading to various microstructures. In this paper, we investigate the influence of supplier variation and resulting microstructure difference on the overall mechanical properties as well as local formability behaviors of advanced high strength steels (AHSS). For this purpose, we first examined the basic material properties and the transformation kinetics of TRansformation Induced Plasticity (TRIP) 800 steels from three different suppliers under different testing temperatures. The experimental results show that there is a significant supplier (i.e., manufacturing process) dependency of the TRIP 800 steel mechanical and microstructure properties. Next, we examined the local formability of two commercial Dual Phase (DP) 980 steels during stamping process. The two commercial DP 980 steels also exhibit noticeably different formability during stamping process in the sense that one of them shows severe tendency for shear fracture. Microstructure-based finite element analyses are carried out next to simulate the localized deformation process with the two DP 980 microstructures, and the results suggest that the possible reason for the difference in formability lies in the morphology of the hard martensite phase in the DP microstructure.},
doi = {10.1115/1.3183778},
journal = {Transactions of the ASME. Journal of Engineering Materials and Technology, 131(4):Article Number: 041205},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {10}
}