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
- Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order
- 材料研究快报（英文） 2023年11卷第6期页码：407-413
- 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
  中图分类号：
- 网络首发：2023-01-25，
  
  纸质出版：2023
- 稿件说明：
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P. Kwasniak, S. Delannoy, F. Prima, 等. Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order[J]. 材料研究快报（英文）, 2023,11(6):407-413.

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.
P. Kwasniak, S. Delannoy, F. Prima, 等. Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order[J]. 材料研究快报（英文）, 2023,11(6):407-413. DOI： 10.1080/21663831.2023.2169082.

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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