Evaluation of factors affecting the edge formability of two hot rolled multiphase steels

Monideepa Mukherjee; Sumit Tiwari; Basudev Bhattacharya

doi:10.1007/s12613-018-1563-1

Volume 25 Issue 2

Feb. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(2): 199-215

Monideepa Mukherjee, Sumit Tiwari, and Basudev Bhattacharya, Evaluation of factors affecting the edge formability of two hot rolled multiphase steels, Int. J. Miner. Metall. Mater., 25(2018), No. 2, pp. 199-215. https://doi.org/10.1007/s12613-018-1563-1

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Monideepa Mukherjee, Sumit Tiwari, and Basudev Bhattacharya, Evaluation of factors affecting the edge formability of two hot rolled multiphase steels, Int. J. Miner. Metall. Mater., 25(2018), No. 2, pp. 199-215. https://doi.org/10.1007/s12613-018-1563-1

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Research Article

Evaluation of factors affecting the edge formability of two hot rolled multiphase steels

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Corresponding author:
Monideepa Mukherjee E-mail: monideepa@tatasteel.com
Received: 19 June 2017; Revised: 5 September 2017; Accepted: 8 September 2017

Abstract

Abstract

In this study, the effect of various factors on the hole expansion ratio and hence on the edge formability of two hot rolled multiphase steels, one with a ferrite-martensite microstructure and the other with a ferrite-bainite microstructure, was investigated through systematic microstructural and mechanical characterization. The study revealed that the microstructure of the steels, which determines their strain hardening capacity and fracture resistance, is the principal factor controlling edge formability. The influence of other factors such as tensile strength, ductility, anisotropy, and thickness, though present, are secondary. A critical evaluation of the available empirical models for hole expansion ratio prediction is also presented.
- stretch flanging;
- hole expansion ratio;
- martensite;
- bainite;
- edge formability;
- multiphase steels

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