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<p>This paper presents the results of investigations into the structure, crystallographic texture and residual stresses of Ti-6Al-4&#xa0;V alloy samples before and after treatment with a low-energy, high-current electron beam in pulse melting mode and radially convergent geometry. Research shows that this type of electron-beam treatment prevents the formation of a columnar structure in the surface layer that solidifies rapidly. Consequently, its hardness does not increase. It has been established that the residual stresses of the first kind in the α-Ti phase are heterogeneously distributed over the surface of the irradiated sample and are dependent on the crystallographic orientation of the surface α-grains. The α-grains forming the basic texture are the most elastically stressed, and the α-grains forming the prismatic texture are the least elastically stressed. The residual stress level of α-grains forming a pyramidal texture occupies an intermediate position between the first two types of grains. A proposed explanation for these differences is based on crystallographic ideas about the slip systems in the hcp-structure of the α-Ti phase.</p> Graphical abstract <p></p>

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Residual elastic stress and texture evolution in the surface layer of a Ti-6Al-4 V alloy induced by pulsed radially converging low-energy high-current electron beams

  • 期刊论文

  • 发表日期：

    2025年11月16日

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  • L. L. Meisner,
  • F. A. D’yachenko,
  • M. G. Ostapenko,
  • S. N. Meisner,
  • V. O. Semin,
  • G. E. Ozur,
  • P. P. Kiziridi,
  • O. B. Naimark,
  • V. A. Oborin,
  • A. N. Balakhnin

摘要

This paper presents the results of investigations into the structure, crystallographic texture and residual stresses of Ti-6Al-4 V alloy samples before and after treatment with a low-energy, high-current electron beam in pulse melting mode and radially convergent geometry. Research shows that this type of electron-beam treatment prevents the formation of a columnar structure in the surface layer that solidifies rapidly. Consequently, its hardness does not increase. It has been established that the residual stresses of the first kind in the α-Ti phase are heterogeneously distributed over the surface of the irradiated sample and are dependent on the crystallographic orientation of the surface α-grains. The α-grains forming the basic texture are the most elastically stressed, and the α-grains forming the prismatic texture are the least elastically stressed. The residual stress level of α-grains forming a pyramidal texture occupies an intermediate position between the first two types of grains. A proposed explanation for these differences is based on crystallographic ideas about the slip systems in the hcp-structure of the α-Ti phase.

Graphical abstract