Strain rate effects on mechanical behavior and microstructure evolution with the sequential strains of TWIP steel

2022 ◽  
pp. 142673
Author(s):  
Chunhui Wang ◽  
Wang Cai ◽  
Chaoyang Sun ◽  
Xintong Li ◽  
Lingyun Qian ◽  
...  
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Microstructure Evolution ◽  
Twip Steel ◽  
Strain Rate Effects ◽  
Rate Effects

Temperature and Strain Rate Effects on Mechanical Behavior of a PMMA

2007 ◽  
Vol 340-341 ◽  
pp. 1079-1084 ◽  
Author(s):  
Tao Suo ◽  
Yu Long Li ◽  
Yuan Yong Liu
Keyword(s):  
Flow Stress ◽  
High Strain Rate ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
High Strain ◽  
Strain Range ◽  
Testing Temperature ◽  
Strain Rate Effects ◽  
Rate Effects ◽  
Increasing Temperature

In this paper, the mechanical behavior of a PMMA used as the windshield of aircraft was tested. The experiments were finished under two quasi-static strain rates and a high strain rate with the testing temperature from 299K to 373K. The results show that the mechanical property of this PMMA depends heavily on the testing temperature. The Young’s modulus and flow stress were found to decrease with increasing temperature at low strain rate. At the strain rate of 10-1 1/s, strain softening was observed under all experiment temperatures. At high strain rate, with the temperature increasing, the flow stress decreases remarkably while the failure strain increases, and the strain soften was also observed at the temperature above 333K. Comparing the experiments results at same temperature, it was found the flow stress increases with the rising strain rate. The predictions of the mechanical behavior using the ZWT theoretical model have a good agreement with experimental results in the strain range of 8%.

Tension-Compression Asymmetry in an Extruded Mg Alloy AZ31: Texture and Strain Rate Effects

2016 ◽  
Vol 849 ◽  
pp. 109-113 ◽  
Author(s):  
Li Li Chang ◽  
Li Peng Chi
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Plastic Anisotropy ◽  
Mg Alloy ◽  
Strain Rate Effects ◽  
Alloy Az31 ◽  
Rate Effects ◽  
Initial Texture ◽  
Tension Compression Asymmetry

The influence of initial texture and strain rate on the mechanical behavior, especially anisotropy and tension-compression asymmetry (TCA) in AZ31 was investigated. The results indicated that the TCA in AZ31 decreased as the strain rate increased, plastic anisotropy increased as the strain rate increased. After compression, the massive twins were observed in AZ31 samples compressed on the extruding direction, while the fraction of twins in samples compressed perpendicular to the ED was smaller.

Mechanical Behavior of a Rephosphorized Steel for Car Body Applications: Effects of Temperature, Strain Rate, and Pretreatment

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Yu Cao ◽  
Johan Ahlström ◽  
Birger Karlsson
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Rate Sensitivity ◽  
Uniaxial Tensile ◽  
Good Precision ◽  
Interstitial Free ◽  
Softening Effect ◽  
Strain Rate Effects ◽  
Uniaxial Tensile Testing ◽  
Rate Effects

Temperature and strain rate effects on the mechanical behavior of commercial rephosphorized, interstitial free steel have been investigated by uniaxial tensile testing, covering temperatures ranging from −60°C to +100°C and strain rates from 1×10−4 s−1 to 1×102 s−1 encompassing most conditions experienced in automotive crash situations. The effect of prestraining to 3.5% with or without successive annealing at 180°C for 30 min has also been evaluated. These treatments were used to simulate pressing of the plates and the paint-bake cycle in the production of car bodies. Yield and ultimate tensile strengths, ductility including uniform and total elongation and area reduction, thermal softening effect at high strain rate, and strain rate sensitivity of stress were determined and discussed in all cases. It was found that the Voce equation [σ=σs−(σs−σ0)exp(ε/ε0)] can be fitted to the experimental true stress-true plastic strain data with good precision. The parameter values in this equation were evaluated and discussed. Furthermore, temperature and strain rate effects were examined in terms of thermal and athermal components of the flow stresses. Finally, a thermal activation analysis was performed.

Anisotropy and strain rate effects on the failure behavior of TWIP steel: A multiscale experimental study

2019 ◽  
Vol 115 ◽  
pp. 178-199 ◽  
Author(s):  
Manjunatha Madivala ◽  
Alexander Schwedt ◽  
Ulrich Prahl ◽  
Wolfgang Bleck
Keyword(s):  
Experimental Study ◽  
Strain Rate ◽  
Twip Steel ◽  
Failure Behavior ◽  
Strain Rate Effects ◽  
Rate Effects

Strain rate effects on the mechanical behavior of two Dual Phase steels in tension

2016 ◽  
Vol 225 (2) ◽  
pp. 409-421 ◽  
Author(s):  
E. Cadoni ◽  
N.K. Singh ◽  
D. Forni ◽  
M.K. Singha ◽  
N.K. Gupta
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Strain Rate Effects ◽  
Rate Effects
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