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
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJMF-9-1_004
تاریخ نمایه سازی: 8 اسفند 1400
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 ۸۵۰, ۹۰۰, and ۹۵۰ºC with strain rates of ۰.۰۰۱, ۰.۰۱, and ۰.۱ (s-۱). 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.
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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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