Mechanical properties and microstructure of in situ formed Ti2AlN/TiAl(WMS)composites

• 作者: Wan-Liang Liang Rui Hu Yi-Wen Liu Tie-Bang Zhang Jin-Shan Li
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 190-194
• 页数: 5页
• 语种: 英文

摘要

The Ti2AlN-reinforced TiAl(WMS)composites with different contents of Ti2AlN were prepared by an in situ method of reactive arc-melting technique.According to the results of X-ray diffraction(XRD)analysis,the Ti2AlN-reinforced WMS composites consist of γ-TiAl,α2-Ti3Al,and Ti2AlN phases.Microstructure analysis results indicate that Ti2AlN reinforcements with rod-like in shape form in the WMS matrix with a α2/γ lamellar structure containing some bulk γ phases.With volume fraction of Ti2AlN increasing,the grain size of the composites decreases significantly and the elasticity modulus(E)increases.The compressive strength and compressive fracture strain of the composite with 3 vol％Ti2AlN have a maximum value of 1,654 MPa and 22.5％,respectively,which are approximately improved by 45.84％and 29.31％,respectively,compared with that of the unreinforced WMS alloy.