Dependence of plastic strain and microstructure on elastic modulus reduction in advanced high-strength steels

Sérgio Fernando Lajarin, Chetan P. Nikhare, Paulo Victor P. Marcondes

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Increase in the use of the advanced high-strength steels (AHSS) is an interesting alternative to automotive industry to reduce vehicle weight and fuel consumption. However, it has been limited due to challenges in formability, tool life, and springback. The springback is pointed in the literature as one of the challenges that involves the mass production of structural components and the aspects that shows influence are still not fully understood. There is still a gap in the literature to analyze the elastic modulus variation during unloading (also called chord modulus). Therefore, this study experimentally examines the variation of elastic modulus in conjunction with plastic strain and initial microstructure of various automotive steels. For all AHSS, it was found that the elastic modulus decreases during loading and unloading with respect to plastic strain. It was observed that the microstructure of AHSS greatly affects the reduction in elastic modulus upon deformation. It was also found that the degradation of elastic modulus also affected by the anisotropy of the material.

Original languageEnglish (US)
Article number87
JournalJournal of the Brazilian Society of Mechanical Sciences and Engineering
Volume40
Issue number2
DOIs
StatePublished - Feb 1 2018

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High strength steel
Plastic deformation
Elastic moduli
Microstructure
Unloading
Formability
Automotive industry
Fuel consumption
Anisotropy
Degradation
Steel

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

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Dependence of plastic strain and microstructure on elastic modulus reduction in advanced high-strength steels. / Lajarin, Sérgio Fernando; Nikhare, Chetan P.; Marcondes, Paulo Victor P.

In: Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol. 40, No. 2, 87, 01.02.2018.

Research output: Contribution to journalArticle

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