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<p>We performed computer simulations of the screw piercing of titanium-nickelide shells in two- and four-high mills. On the basis of the accumulated numerical results, we compute the parameters of the stress-strain and thermal states of the shells. The distributions of levels of the accumulated strain and the normalized mean stress show that a&#xa0;more homogeneous stress-strain state and a&#xa0;lower hazard of fracture of the shells are detected in the case of four-high piercing. The analysis of the temperature distribution shows that, in the case of four-high piercing, the obtained temperature state is more favorable for guaranteeing higher levels of plasticity of the materials of pierced shells.</p>

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Evaluation of the stress-strain and thermal states of Ni–Ti-alloy billets subjected to screw piercing

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • M. M. Skripalenko,
  • V. A. Andreev,
  • B. A. Romantsev,
  • V. S. Yusupov,
  • S. O. Rogachev,
  • M. P. Kuprikov,
  • V. P. Kuznetsov,
  • M. N. Skripalenko,
  • E. V. Shuster

摘要

We performed computer simulations of the screw piercing of titanium-nickelide shells in two- and four-high mills. On the basis of the accumulated numerical results, we compute the parameters of the stress-strain and thermal states of the shells. The distributions of levels of the accumulated strain and the normalized mean stress show that a more homogeneous stress-strain state and a lower hazard of fracture of the shells are detected in the case of four-high piercing. The analysis of the temperature distribution shows that, in the case of four-high piercing, the obtained temperature state is more favorable for guaranteeing higher levels of plasticity of the materials of pierced shells.