Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order

P. Kwasniak; S. Delannoy; F. Prima; E. Clouet

doi:10.1080/21663831.2023.2169082

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Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order

Original Reports | 更新时间：2026-08-19

- Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order
- Materials Research Letters Vol. 11, Issue 6, Pages: 407-413(2023)
- 作者机构：
  
  1. a Multidisciplinary Research Center Cardinal Stefan Wyszynski University in Warsaw
  2. b Chimie ParisTech CNRS Institut de Recherche de Chimie Paris PSL Research University
  3. c Service de Recherches de Métallurgie Physique Université Paris-Saclay CEA
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2023.2169082
  CLC：
- Online First：25 January 2023，
  
  Published：2023
- 稿件说明：
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P. Kwasniak, S. Delannoy, F. Prima, et al. Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order[J]. Materials Research Letters, 2023, 11(6): 407-413.
DOI：

P. Kwasniak, S. Delannoy, F. Prima, et al. Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order[J]. Materials Research Letters, 2023, 11(6): 407-413. DOI： 10.1080/21663831.2023.2169082.

摘要

Plasticity of hexagonal titanium–aluminum alloys depends on the solute concentration and the order state of Al atoms. Development of short-range order (SRO) modifies Al strengthening and impacts the competition between prismatic and basal slip modes. Using

ab initio

calculations

we study the interaction of a screw dislocation with isolated Al atoms and Al pairs in an hcp Ti existing in short-range o

rdered Ti–Al alloys. Calculated activation energies reveal pronounced hardening caused by Al addition for both slip systems

which become competitive. This hardening is enhanced for Al pairs

resulting in a reduced plastic anisotropy of Ti–Al alloys with SRO.

Abstract

ab initio

calculations

we study the interaction of a screw dislocation with isolated Al atoms and Al pairs in an hcp Ti existing in short-range ordered Ti–Al alloys. Calculated activation energies reveal pronounced hardening caused by Al addition for both slip systems

which become competitive. This hardening is enhanced for Al pairs

resulting in a reduced plastic anisotropy of Ti–Al alloys with SRO.

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