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A novel phenomenological constitutive model for Ti-6Al-4V at high temperature conditions and quasi-static strain rates
, Article Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering ; Volume 235, Issue 13 , 2021 , Pages 1831-1842 ; 09544100 (ISSN) ; Hosseini Kordkheili, A ; Sharif University of Technology
SAGE Publications Ltd
2021
Abstract
Phenomenological constitutive modeling of Ti-6Al-4V at temperatures between 923 and 1023 K under 0.0005–0.05 s−1 quasi-static rates is studied based on a phenomenological approach. For this purpose, the Johnson–Cook constitutive model is revisited. At low temperature conditions under moderate to high strain rates, the material’s stress–strain curves are the most similar to power-law function. Contrary to this, at high temperature conditions under low to moderate strain rates, the saturation-type function well describes the stress–strain curves. On the other hand, it is illustrated that the Johnson–Cook constitutive model is feeble to predict the material’s behavior correctly. Accordingly, in...
Finite element and experimental method for analyzing the effects of martensite morphologies on the formability of DP steels
, Article Mechanics Based Design of Structures and Machines ; 2019 ; 15397734 (ISSN) ; Torabi, M. A ; Sareban, M ; Lashini, H ; Sadeghi, E ; Fazaeli, A ; Habibi, M ; Hashemi, R ; Sharif University of Technology
Taylor and Francis Inc
2019
Abstract
In this article, we investigated the effect of martensite morphology on the mechanical properties and formability of dual phase steels. At first, three heat treatment cycles were subjected to a low-carbon steel to produce ferrite–martensite microstructure with martensite morphology of blocky-shaped, continuous, and fibrous. Tensile tests were then carried out so as to study mechanical properties, particularly the strength and strain hardening behavior of dual phase steels. In order to study the formability of dual phase samples, Forming Limit Diagram was obtained experimentally and numerically. Experimental forming limit diagram was obtained using Nakazima forming test, while Finite Element...
Finite element and experimental method for analyzing the effects of martensite morphologies on the formability of DP steels
, Article Mechanics Based Design of Structures and Machines ; Volume 48, Issue 5 , 2020 , Pages 525-541 ; Torabi, M. A ; Sareban, M ; Lashini, H ; Sadeghi, E ; Fazaeli, A ; Habibi, M ; Hashemi, R ; Sharif University of Technology
Taylor and Francis Inc
2020
Abstract
In this article, we investigated the effect of martensite morphology on the mechanical properties and formability of dual phase steels. At first, three heat treatment cycles were subjected to a low-carbon steel to produce ferrite–martensite microstructure with martensite morphology of blocky-shaped, continuous, and fibrous. Tensile tests were then carried out so as to study mechanical properties, particularly the strength and strain hardening behavior of dual phase steels. In order to study the formability of dual phase samples, Forming Limit Diagram was obtained experimentally and numerically. Experimental forming limit diagram was obtained using Nakazima forming test, while Finite Element...