Adiabatic Self-Heating Determination for Ti6al4v at Different Temperatures

Sela, Andres; Ortiz-de-Zarate, G.; Soler, D.; Germain, Guénaël; Gallegos, Linamaria; Arrazola, P.J.

doi:10.2139/ssrn.4084591

Cited by 2 publications

(1 citation statement)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 28 ] Local plastic instability due to thermal softening effect occurred, resulting in the formation of ASBs. [ 29 ] At a strain rate of 5000 s −1 , Figure depicts the ASB and crack traversing part of the impacted specimen. As illustrated in Figure 15b, cracks that started at the contact surface can be seen to spread down the ASB and into the interior of the specimen.…”

Section: Microstructure Evolutionmentioning

confidence: 99%

Dynamic Constitutive Model and Deformation Mechanism of 2219 Aluminum Alloy Based on the Dynamic Interruption Recovery

Liu,

Jin,

Qiu

et al. 2024

Adv Eng Mater

View full text Add to dashboard Cite

Dynamic compression and interruption‐recovery experiments are carried out to investigate the dynamic adiabatic and isothermal deformation behavior of the 2219 aluminum alloy at various strain rates (0.001–5000 s‐1). The results of the experiments show that adiabatic temperature increase and strain rates have an impact on the compression behavior of 2219 aluminum alloy. The yield strength is strongly associated with strain rates, demonstrating an evident strain rate hardening effect. The increase in adiabatic temperature is the key factor contributing to the decline in adiabatic strain hardening rate. According to microstructural analysis, the adiabatic shear band (ASB) is first detected with strain rate of 3200 s‐1 along the loading direction. At a strain of 30.3%, cracks begin to appear, and shearing fractures occur with a strain rate of 5000 s‐1 in the direction of 45◦. Finally, the Johnson‐Cook constitutive model is modified with the strain rate reinforcement terms corrected and an adiabatic softening term added to reflect the isothermal and adiabatic compression behaviors. The improved model is better at describing the strain rates affect the behavior of isothermal and adiabatic deformation.This article is protected by copyright. All rights reserved.

show abstract

Section: Microstructure Evolutionmentioning

confidence: 99%