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Forming limit diagram of Advanced High Strength Steels (AHSS) based on strain-path diagram

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Title Forming limit diagram of Advanced High Strength Steels (AHSS) based on strain-path diagram
 
Creator BHARGAVA, M
TEWARI, A
MISHRA, SK
 
Subject MECHANICAL-PROPERTIES
TRIP STEEL
FORMABILITY PREDICTION
RETAINED AUSTENITE
MICROSTRUCTURE
DEFORMATION
FERRITE
CARBON
AA5083
SHEET
Forming limit curve
AHSS
Finite element analysis
Strain-path diagram
Necking criteria
 
Description Advanced High Strength Steels (AHSS) is a promising material for automotive applications clue to its high strength-to-weight ratio compared to other steels. Recently third generation steels have been developed which show intermediate properties between first and second generation AHSS. Formability analysis was performed between first generation Transformation Induced Plasticity (TRIP) and second generation Quenched and Partitioned (Q&P) AHSS. The main objective of the study is to perform formability analysis of TRIP and (28.21) AHSS. The chemical compositions of both the steels are almost similar but different processing conditions lead to microstructural variations. Experimental and simulated strain-path diagram (SPD) was plotted from drawing to stretching regions using Limit Dome Height (LDH) test and Finite Element Method (ELM) respectively. The formability of TRIP steel is higher when compared to Q&P steels. Stretching regions show large deviation between experimental and simulated SPD for both the steels. A new strain localization criterion is proposed to construct a forming limit curve (FLC) for both experimental and simulated SPD. The proposed failure criterion is compared with other failure criteria for ELC prediction. The FLC based on new strain localization criterion shows better agreement with experimental FLC compared to other failure criteria. (C) 2015 Elsevier Ltd. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2016-01-15T04:35:16Z
2016-01-15T04:35:16Z
2015
 
Type Article
 
Identifier MATERIALS & DESIGN, 85,149-155
0261-3069
1873-4197
http://dx.doi.org/10.1016/j.matdes.2015.06.147
http://dspace.library.iitb.ac.in/jspui/handle/100/17771
 
Language en