Journal ArticleDOI
High speed tensile test of steel sheets for the stress-strain curve at the intermediate strain rate
Hoon Huh,J. H. Lim,S. H. Park +2 more
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In this article, a servo-hydraulic type high speed tensile testing machine was used to obtain stress-strain curves of mild steel and advanced high strength steels at strain rates ranged from 1/sec to 200/sec.Abstract:
This paper presents stress-strain curves of steel sheets for an auto-body obtained at intermediate strain rates with a servo-hydraulic type high speed tensile testing machine. The apparatus has the maximum stroke velocity of 7.8 m/sec to obtain the tensile material properties at a strain rate of up to 500/sec. A special jig fixture is specially designed for accurate acquisition of tensile loads with reduction of the load-ringing phenomenon induced by unstable stress wave propagation at high strain rates. Tensile testing of steel sheets for an auto-body was carried out to obtain stress-strain curves of mild steel and advanced high strength steels at strain rates ranged from 1/sec to 200/sec. The test results provide interesting information regarding the stress-strain curves at intermediate strain rates ranged from 1/sec to 200/sec and demonstrate that strain rate hardening is strongly coupled with strain hardening.read more
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A review of safety-focused mechanical modeling of commercial lithium-ion batteries
TL;DR: In this paper, the authors present a review of the literature on mechanical loading and response of battery cells and present a roadmap for future research on battery safety issues, including thermal runaway, fire, and explosion.
Journal ArticleDOI
Inoculation treatment of an additively manufactured 2024 aluminium alloy with titanium nanoparticles
Qiyang Tan,Jingqi Zhang,Qiang Sun,Zhiqi Fan,Gan Li,Gan Li,Yu Yin,Yingang Liu,Ming-Xing Zhang +8 more
TL;DR: In this article, the in-situ formation of Al3Ti nanoparticles with a L12 ordered structure, which formed a coherent interface with Al matrix and therefore significantly promoted the heterogeneous nucleation of the α-Al during solidification of melt pools in the SLM process.
Journal ArticleDOI
Effect of cooling rate on the high strain rate properties of boron steel
TL;DR: In this paper, the effect of cooling rate on the high strain rate behavior of hardened boron steel was investigated and the results showed that the failure mechanism transformed from a ductile-shear mode at lower cooling rates to a shear mode in the high cooling rates.
Journal ArticleDOI
Forming limit diagram of auto-body steel sheets for high-speed sheet metal forming
TL;DR: In this article, a high-speed camera was used to measure the uniaxial tensile properties and the formability of steel sheets in relation to the strain rate effect.
Journal ArticleDOI
Inoculation Treatment of an Additively Manufactured 2024 Aluminium Alloy with Titanium Nanoparticles
Qiyang Tan,Jingqi Zhang,Qiang Sun,Zhiqi Fan,Gan Li,Gan Li,Yu Yin,Yingang Liu,Ming-Xing Zhang +8 more
TL;DR: In this article, the in-situ formation of Al3Ti nanoparticles with a L12 ordered structure, which formed a coherent interface with Al matrix and therefore significantly promoted the heterogeneous nucleation of the α-Al during solidification of melt pools in the SLM process.
References
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