@inproceedings{a9db662d1e254ae7a663d56071b17939,
title = "Recent progress of large ingots for high Nb containing TiAl alloy",
abstract = "The high Nb alloying (6-10 at\%) offers a great chance to raise high temperature capacity in terms of excellent oxidation resistance and significant solid solution strengthening in the temperature range of 800-900°C for high Nb containing TiAl alloy. As results, TiAl alloy has been divided into two categories: conventional TiAl and high temperature TiAl. The recent study on the large ingots of high Nb containing TiAl alloys demonstrates the melting and hot work ability. Two melting processing including plasma arc melting (PAM) and VAR+Skull melting (SM) can be successfully used. The microsegregation in the PAM melting ingots is relatively slight comparing with the SM ingots. Three types of microsegregation have been determined in terms of distribution of Al, Nb, and W alloying elements. Canned forging can be successfully conducted to make pancakes. The mechanical properties of the large pancakes can be significantly improved by the microstructure homogenization due to optimized processing. The critical root radius of notch sensitivity of tensile test at room temperature can be reduced to 0.5 mm.",
keywords = "High Nb containing TiAl alloy, Lager ingot, Micro-segregation",
author = "Guoliang Chen and Junpin Lin and Xiangjun Xu and Yanli Wang and Feng Ye and Zhi Lin",
year = "2007",
language = "英语",
isbn = "9780873396905",
series = "TMS Annual Meeting",
pages = "37--46",
booktitle = "Properties and Performance of High Temperature Alloys and Coatings 2007 - Proceedings of Symposium held during the 2007 TMS Annual Meeting",
note = "136th TMS Annual Meeting, 2007 ; Conference date: 25-02-2007 Through 01-03-2007",
}