Influence of heat treatment on microstructure and nanohardness of TiAl alloy solidified under high pressure

被引：0

作者：

Dong-dong Zhu

Duo Dong

Jie-ren Yang

Li Liu

Xiao-hong Wang

Yuan-xiang Zhang

Zun-jie Wei

机构：

[1] Quzhou University,Key Laboratory of Air

[2] Harbin Institute of Technology,driven Equipment Technology of Zhejiang Province

[3] Northwestern Polytechnical University,School of Materials Science and Engineering

来源：

China Foundry | 2020年 / 17卷

关键词：

heat treatment; TiAl; microstructure; nanohardness; TG146.23; A;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The Ti-48at.%Al alloy solidified under different pressures was prepared using a tungsten-carbide six-anvil apparatus and then heat treated at different temperatures. The effect of heat treatment on microstructure and mechanical properties of high pressure solidified Ti-48Al alloy was investigated. The results showed that the phase constitution of the Ti-48Al alloy solidified under high pressure did not change after heat treatment. After 1,100 °C/12 h AC (air cooling), the value of c/a showed a slight increase. The Widmanstätten structure was formed in the samples solidified under 2 GPa and 4 GPa. More defects were found in the high-pressure samples. The volume fraction of α2 particles increased with an increase in pressure. After 1,150 °C/4 h AC, the discontinuous coarsening phenomenon could only be found in the 4 GPa solidified samples. The formation of α2 phase can lead to the increase of nanohardness. Compared with the samples before heat treatment, the nanohardness increased about 1.0–1.2 GPa.

引用

页码：435 / 440

页数：5

共 50 条

[31] Achieving fine fully lamellar microstructure of casting TiAl alloy by simple heat treatment [J].

Jung, Yoon-Oh ;

Kim, Min-Sik ;

Park, Jisung ;

Yang, Guang ;

Lee, Dong Won ;

Kim, Seong-Woong .

MATERIALS CHARACTERIZATION, 2023, 200

[32] Influence of Heat Treatment and High-Pressure Torsion on Phase Transformations in TiZrHfMoCr High-Entropy Alloy [J].

Gornakova, Alena ;

Straumal, Boris ;

Kuzmin, Alexei ;

Tyurin, Alexander ;

Chernyaeva, Elena ;

Druzhinin, Alexander ;

Afonikova, Natalia ;

Davdian, Gregory .

METALS, 2023, 13 (06)

[33] Microstructure and mechanical properties of a forged β-solidifying γ TiAl alloy in different heat treatment conditions [J].

Bolz, S. ;

Oehring, M. ;

Lindemann, J. ;

Pyczak, F. ;

Paul, J. ;

Stark, A. ;

Lippmann, T. ;

Schruefer, S. ;

Roth-Fagaraseanu, D. ;

Schreyer, A. ;

Weiss, S. .

INTERMETALLICS, 2015, 58 :71-83

[34] Effect of heat treatment on microstructure and microhardness of directionally solidified NiAl-Cr(Mo)-Hf intermetallic alloy [J].

Xu, CM ;

Guo, HT ;

Xie, XS .

14TH CONGRESS OF INTERNATIONAL FEDERATION FOR HEAT TREATMENT AND SURFACE ENGINEERING, VOLS 1 and 2, PROCEEDINGS, 2004, :165-168

[35] DENSIFICATION MECHANISM OF TiAl PRE-ALLOY POWDERS CONSOLIDATED BY HOT ISOSTATIC PRESSING AND EFFECTS OF HEAT TREATMENT ON THE MICROSTRUCTURE OF TiAl POWDER COMPACTS [J].

Wang Gang ;

Xu Lei ;

Cui Yuyou ;

Yang Rui .

ACTA METALLURGICA SINICA, 2016, 52 (09) :1079-1088

[36] Effect of Heat Treatment on Microstructure and Microhardness of Directionally Solidified NiAl-Cr(Mo)-Hf Intermetallic Alloy [J].

XU Chun-mei l’\ GUO Jian-ting 2 .

材料热处理学报, 2004, (05) :165-168

[37] Microstructure of the Hypoeutectic Al-Mg Alloy Solidified at 4 GPa High Pressure [J].

Zhen-Ling Wang ;

Yu-Cheng Yu ;

Zun-Jie Wei .

Journal of Harbin Institute of Technology(New series), 2013, (05) :101-105

[38] Influence of heat treatment on the microstructure and mechanical properties of DZ951 alloy [J].

XIA Pengchengab YU Jingjianga SUN Xiaofenga GUAN Hengronga HU Zhuangqia a Institute of Metal ResearchChinese Academy of SciencesShenyang China b School of Materials Science and EngineeringShandong University of Science and TechnologyQingdoo China .

RareMetals, 2008, (02) :216-222

[39] Influence of heat treatment on the microstructure and mechanical properties of DZ951 alloy [J].