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Constitutive Modeling of a Nb-Contained Advanced High-Strength Steel (AHSS) under Hot Compression Experiments

Publish place: The Iranian Journal of Materials Forming، Vol: 9، Issue: 1
Publish Year: 1401
Type: Journal paper
Language: English
View: 280

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Link to this Paper:
https://civilica.com/doc/1408679

Document National Code:

JR_IJMF-9-1_004

Index date: 27 February 2022

Constitutive Modeling of a Nb-Contained Advanced High-Strength Steel (AHSS) under Hot Compression Experiments abstract

In this study, the evaluation of hot forming behavior of an advanced high-strength steel (AHSS), namely Nb-Contained dual phase (DP) steel, is carried out using hot compression tests at temperatures of 850, 900, and 950ºC with strain rates of 0.001, 0.01, and 0.1 (s-1). The resulting flow curves indicated the occurrence of dynamic recrystallization (DRX) at all different conditions of testing. Furthermore, based on the measured stress-strain data, material constants and activation energy (Q) were calculated for the peak stress. Additionally, the values of these constants were estimated for different true strains and the correlation between them and the strain has been illustrated by various diagrams. The comparison shows that the derived Arrhenius equation has an accepted accuracy for predicting the values of flow stress.

Constitutive Modeling of a Nb-Contained Advanced High-Strength Steel (AHSS) under Hot Compression Experiments Keywords:

Hot compression , constitutive equation , High-strength steel , Dual Phase Steel

Constitutive Modeling of a Nb-Contained Advanced High-Strength Steel (AHSS) under Hot Compression Experiments authors

Hasan Sheikh

Department of Materials Engineering, Malek Ashtar University of Technology, Shahinshahr, Iran

Hooman Chavilian

Department of Materials Engineering, Malek Ashtar University of Technology, Shahinshahr, Iran

Reza Vafaei

Department of Materials Engineering, Malek Ashtar University of Technology, Shahinshahr, Iran

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