Journal ArticleDOI
High temperature mechanical properties of dual phase steels
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In this article, dual phase steels with different martensite volume fraction and morphology were tensile tested at temperature range of 25-550 °C and showed serration flow at temperature ranges of 250-450 °C, and smooth flow at the other temperatures.About:
This article is published in Materials Letters.The article was published on 2005-07-01. It has received 53 citations till now. The article focuses on the topics: Tempering & Tensile testing.read more
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Study of dynamic strain aging in dual phase steel
TL;DR: In this article, the authors evaluated the susceptibility to dynamic strain aging of a dual phase steel by the variation of mechanical properties in tension with the temperature and the strain rate, and determined apparent activation energy values associated with the beginning of the Portevin-Le Chatelier effect.
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The influence of temperatures and strain rates on the mechanical behavior of dual phase steel in different conditions
TL;DR: In this article, a commercial dual phase steel (DP 800) was strained to 3.5% followed by annealing at 180% and the results showed that the performance of DP 800 was similar to that of the standard dual-phase steel.
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Effect of temperature on flow and work hardening behavior of high bainite dual phase (HBDP) steels
TL;DR: In this paper, the effect of temperature on dual-phase steel has been investigated and it was found that the onset strain of stage II work hardening is athermal in the DSA region.
Journal ArticleDOI
Micromechanical finite element analysis of the effects of martensite morphology on the overall mechanical behavior of dual phase steel
TL;DR: In this article, the effect of the morphology of the martensite hard phase on the overall stress-strain response of dual-phase (DP) steels is studied through generating realistic virtual representative volume elements (RVEs) and adapting a microstructural-based approach using a finite deformation elastic-viscoplastic constitutive model.
Journal ArticleDOI
Temperature and strain rate effects on the mechanical behavior of dual phase steel
Abstract: The effect of temperature and strain rate on the mechanical behavior of a commercial dual phase steel (DP 800) has been investigated experimentally by uniaxial tensile tests in this study, covering temperatures (−60 °C to 100 °C) and strain rates (1×10–4 to 1×10+2 s−1) encompassing conditions experienced in automotive crash situations. Yield and ultimate tensile strength, ductility, temperature effects and strain rate sensitivity have been determined and discussed. It was found that the Voce equation [σ=σs−(σs−σ0)exp(−eθ0/σs))] can be satisfactorily applied to describe the tensile flow curves by means of a modified Kocks–Mecking model. In this model the parameter θ0 is fixed, whereas both σ0 and σs consist of athermal and thermal stress components. The athermal component is only weakly dependent on temperature through the elastic shear modulus μ. The thermal stress component is governed by temperature and strain rate. Statistical analysis based on the experimental data has allowed all parameters in the Voce equation to be quantified.
References
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Journal ArticleDOI
The portevin-Le Chatelier effect in deformation with constant stress rate
L.P. Kubin,Y. Estrin +1 more
TL;DR: In this article, a mathematical model is presented which provides a link between the microscopic and the macroscopic aspects of nonuniform plastic flow associated with the Portevin-Le Chatelier (PLC) effect.
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The deformation behavior of a vanadium-strengthened dual phase steel
TL;DR: In this paper, a study has been made of the mechanical properties of dual phase (martensite plus ferrite) structures produced when a V containing HSLA steel is cooled in a controlled manner from either the austenite or austenites plus ferrites phase fields, such a heat treatment results in the pearlite regions and carbide particles of the standard V steel being replaced by martensite; this leads to a decrease in the yield stress and an increase in ductility while the tensile strength is essentially unchanged.
Journal ArticleDOI
The rate dependence of the portevin-Le chatelier effect
L.P. Kubin,K. Chihab,Y. Estrin +2 more
TL;DR: In this paper, a general criterion for the occurrence of the Portevin-Le Chatelier effect, which incorporates the influence of the applied stress rate or strain rate, is obtained by examining the conditions for the vanishing of the microscopic strain rate sensitivity.
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Effect of serrated flow on deformation behaviour of AISI 403 stainless steel
TL;DR: AISI 403, a martensitic stainless steel in the quenched and tempered condition has been subjected to uni-axial tension test at a range of strain rates (2×10−5−10−2 s−1) and a series of temperatures (25−500°C) to investigate the effect of temperature and strain rate on its mechanical properties.
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Effects of martensite morphology and volume fraction on quasi-static and dynamic deformation behavior of dual-phase steels
Sangho Kim,Sunghak Lee +1 more
TL;DR: In this paper, the effects of martensite morphology and volume fraction on the quasi-static and dynamic deformation behavior of dual-phase steels were investigated using a torsional Kolsky bar for four steel specimens.
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