Paper Title:
Microstructures and Mechanical Properties of Ti-48Al-2Cr-2Nb-xW
  Abstract

The microstructures and mechanical properties of three powder metallurgy Ti-48Al-2Cr- 2Nb-xW alloys (where x=0, 0.5, and 1 atomic percent (at.%)) are presented. The results indicate that a solution heat treatment combined with controlled cooling generate a fully lamellar (FL) microstructure without the formation of detrimental Widmanstätten or massively transformed γ phases. Aging causes coarsening of the FL microstructure in the alloys containing 0%W and 0.5%W, while almost no coarsening occurs in the 1%W sample. The addition of W to the base composition results in the formation of precipitates at the lamellar interfaces and grain boundaries during aging which helps stabilize the FL microstructure. The amount of W and the aging time affect the room temperature hardness values and tensile properties.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
481-486
DOI
10.4028/www.scientific.net/MSF.561-565.481
Citation
D. Y. Seo, S. Bulmer, H. Saari, P. Au, "Microstructures and Mechanical Properties of Ti-48Al-2Cr-2Nb-xW", Materials Science Forum, Vols. 561-565, pp. 481-486, 2007
Online since
October 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: J.K. Kim, Dong-Seok Chung, H.S. Park, Manabu Enoki
Abstract:The effect of beryllium (Be) on the precipitation behaviors and mechanical properties of Al–Cu–Li–Mg–Zr–(Ag) alloys was investigated. The...
381
Authors: C.S. Kim, J.H. Kang, Jai Won Byeon, S.I. Kwun
Abstract:The magnetic coercivity of ferritic 12Cr steel was experimentally studied in order to characterize its microstructures and mechanical...
1253
Authors: Xi Wu Li, Bai Qing Xiong, Yon Gan Zhang, Guo Jun Wang, Zhi Hui Li, Bao Hong Zhu, Feng Wang, Hong Wei Liu
Abstract:In this study, the effect of various aging treatment (T6 and T7 treatment) on the mechanical properties, electrical conductivity and the...
273
Authors: Dong Yi Seo, Scott Bulmer, H. Saari, Han Liang Zhu, Peter Au
Abstract:Pre-alloyed powders with a nominal composition of Ti-48Al-2Cr-2Nb+1W were consolidated by hot isostatic pressing (HIP). After the HIP...
496
Authors: Zhong Bo Zhou, Jin Shan Li, Hong Chao Kou, Zhi Shou Zhu, Bin Tang, Hui Chang
Abstract:In order to develop a perspective of the new metastable β titanium alloy——TB-13, the influence of ageing treatments on the microstructure and...
859