Effect of heat treatment on the mechanical properties of TiAl alloy

DOI

10.2991/imst-16.2016.53How to use a DOI?

Keywords

TiAl alloy; heat treatment; grain refining; micro hardness; lanthanum.

Abstract

Heat treatment can influence the microstructure and mechanical properties, in order to homogenize the composition and microstructure, improve the mechanical properties, Ti44Al6Nb0.9La alloy was heat treated at different temperatures and cooling conditions. The experimental results showed that macro-grains grew larger with the elevated temperature. The near-lamellar microstructure was obtained after heat treatment of 1200°C for 2 hours, which transformed into fully-lamellar microstructure as the temperature rose. In addition, linear and lumpish lanthanum compounds were located at inter-lamellae and the colony boundaries, which accumulated more with the accelerated temperature. Micro-hardness test indicated the value of micro-hardness increased differently and the value was the relative maximum when the temperature was 1270°C, as a result of solution strengthening of Nb and precipitation strengthening of La. s

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Jun Liu
AU  - Yulan Hu
AU  - Hongchao Qiao
AU  - Jibin Zhao
PY  - 2016/11
DA  - 2016/11
TI  - Effect of heat treatment on the mechanical properties of TiAl alloy
BT  - Proceedings of the 2016 International Conference on Innovative Material Science and Technology (IMST 2016)
PB  - Atlantis Press
SP  - 359
EP  - 364
SN  - 1951-6851
UR  - https://doi.org/10.2991/imst-16.2016.53
DO  - 10.2991/imst-16.2016.53
ID  - Liu2016/11
ER  -