Scholarlink

<p>In this study, uniaxial tensile and creep tests were performed to describe the low- and intermediate-temperature deformation behaviour of the 7075 Aluminum (Al) alloy. Hollomon model was proven to be a feasible choice for obtaining the true stress-strain curve of the material in practical engineering. Meanwhile, the influence of strain rate was also estimated by Johnson-Cook (JC) model. The elastic-plastic deformation behaviour was reasonably predicted based on the machine learning method. In addition, creep deformation and damage evolution were estimated using the Kachanov-Robotnov (K-R) creep damage model. The steady-state creep stage was found to account for approximately 40% of the creep life. Based on these, isochronous stress-strain curves of the 7075 Al alloy were established, considering the influence of elastic-plastic and creep deformation features. Three limit strain criteria were used to estimate the allowable stress for different lifetimes, which may provide a reference for practical engineering structures.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Experimental Investigation on the Deformation Behaviour and Curve Prediction Method of 7075 Aluminum Alloy

  • 期刊论文

  • 发表日期：

    2025年3月10日

查看全文
  • Haonan Yu,
  • Changjian Li,
  • Bo Wu,
  • Sisheng Yang,
  • Hao Peng

摘要

In this study, uniaxial tensile and creep tests were performed to describe the low- and intermediate-temperature deformation behaviour of the 7075 Aluminum (Al) alloy. Hollomon model was proven to be a feasible choice for obtaining the true stress-strain curve of the material in practical engineering. Meanwhile, the influence of strain rate was also estimated by Johnson-Cook (JC) model. The elastic-plastic deformation behaviour was reasonably predicted based on the machine learning method. In addition, creep deformation and damage evolution were estimated using the Kachanov-Robotnov (K-R) creep damage model. The steady-state creep stage was found to account for approximately 40% of the creep life. Based on these, isochronous stress-strain curves of the 7075 Al alloy were established, considering the influence of elastic-plastic and creep deformation features. Three limit strain criteria were used to estimate the allowable stress for different lifetimes, which may provide a reference for practical engineering structures.