Long-period stacking ordering induced ductility of nanolamellar TiAl alloy at elevated temperature

Guoming Zheng; Bin Tang; Wei Chen; Songkuan Zhao; Yizhen Xie; Xiaofei Chen; Jinshan Li; Lei Zhu

doi:10.1080/21663831.2023.2173537

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Long-period stacking ordering induced ductility of nanolamellar TiAl alloy at elevated temperature

Original Reports | 更新时间：2026-08-19

- Long-period stacking ordering induced ductility of nanolamellar TiAl alloy at elevated temperature
- Long-period stacking ordering induced ductility of nanolamellar TiAl alloy at elevated temperature
- 材料研究快报（英文） 2023年11卷第6期页码：414-421
- 作者机构：
  
  1. a State Key Laboratory of Solidification Processing Northwestern Polytechnical University
  2. a State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi’an People’s Republic of China
  3. b Chongqing Innovation Center Northwestern Polytechnical University
  4. c AVIC Manufacturing Technology Institute
  5. d Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology School of Materials Science and Engineering Xi’an University of Technology
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2023.2173537
  中图分类号：
- 网络首发：2023-02-01，
  
  纸质出版：2023
- 稿件说明：
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Guoming Zheng, Bin Tang, Wei Chen, 等. Long-period stacking ordering induced ductility of nanolamellar TiAl alloy at elevated temperature[J]. 材料研究快报（英文）, 2023,11(6):414-421.

Guoming Zheng, Bin Tang, Wei Chen, et al. Long-period stacking ordering induced ductility of nanolamellar TiAl alloy at elevated temperature[J]. Materials Research Letters, 2023, 11(6): 414-421.
Guoming Zheng, Bin Tang, Wei Chen, 等. Long-period stacking ordering induced ductility of nanolamellar TiAl alloy at elevated temperature[J]. 材料研究快报（英文）, 2023,11(6):414-421. DOI： 10.1080/21663831.2023.2173537.

Guoming Zheng, Bin Tang, Wei Chen, et al. Long-period stacking ordering induced ductility of nanolamellar TiAl alloy at elevated temperature[J]. Materials Research Letters, 2023, 11(6): 414-421. DOI： 10.1080/21663831.2023.2173537.

摘要

Abstract

This work reports that the plastic deformation mechanism of lamellar microstructure (LM) in Ti-43.5Al-4Nb-1Mo-0.1B (TNM) alloy transforms from stacking faults (SFs)-dominated process to long-period stacking ordering (LPSO) structures-mediated process with a slight increase in lamellar spacing (LS) (20–36 nm). Multiple LPSO bands significantly enhance the work hardening response and trigger the transformation-induced plasticity (TRIP) effect

causing a four-fold higher ductility than SF-deformed LM at 750°C without compromising yield strength (YS). This phenomenon provides novel insights into the development of high-performance TiAl alloys with extremely nano-LM (LS 55 nm) at elevated temperatures.

IMPACT STATEMENT

The development of multiple nanometer-sized LOPS bands during deformation in nanolamellar TiAl alloys can significantly improve ductility without resulting in a reduction of yield strength.

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相关机构

a Multidisciplinary Research Center – Cardinal Stefan Wyszynski University in Warsaw

a Multidisciplinary Research Center – Cardinal Stefan Wyszynski University in Warsaw Warsaw Poland

b Institute of High Pressure Physics Polish Academy of Sciences

c PSL Research University Chimie ParisTech CNRS Institut de Recherche de Chimie Paris

a State Key Laboratory of Metastable Materials Science and Technology & School of Materials Science and Engineering Yanshan University

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