The lamellar microstructure and fracture behavior of γ-based TiAl alloy produced by centrifugal spray deposition

被引：10

作者：

Chen, WZ

Song, XP

Qian, KW

Gu, HC ^{[1
]}

机构：

[1] Xian Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Fuzhou Univ, Dept Mat Sci & Engn, Fuzhou 350002, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 247卷 / 1-2期

关键词：

microstructure; fracture; titanium; aluminum;

D O I：

10.1016/S0921-5093(97)00762-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The lamellar structure and fracture behavior of a gamma-based Ti-48Al-2Mn-2Nb (at.%) alloy produced by centrifugal spray deposition (CSD) processing have been systematically investigated. The results show that the formation of the lamellar structure observed with scanning electron microscopy (SEM) results from the dendrite segregation during rapid solidification, and the lath structure revealed by transmission electron microscopy (TEM) stems from phase transformation under alpha-transus temperature. The CSD processing provides finer lamellar colonies in gamma-titanium aluminide, and as a consequense, moderate ductility with appropriate fracture toughness can be achieved. Based on the experimental observations, the toughening mechanisms in the CSD Ti-48Al-2Mn-2Nb alloy are discussed. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：126 / 134

页数：9

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