Paper Title:
Microstructure and High Temperature Mechanical Property of Directionally Solidified NiAl-Cr(Mo)-W/Nb Alloy
  Abstract

The microstructure, high temperature tensile behavior of the DS NiAl-Cr(Mo)-W/Nb alloy have been investigated. The transverse microstructure of the alloy consists typically of eutectic colonies of NiAl and Cr(Mo) phase with white phases segregating at the cell boundaries. The white phase is possibly Cr(Mo) phase containing large amount of Nb and W elements. The longtitudinal microstructure of the alloy is lamellar with the direction basically parallel to the directional solidification direction. The tensile yield strength and ultimate strength of the DS NiAl-Cr(Mo)-W/Nb alloy are much higher than that of the general cast NiAl-Cr(Mo)-W/Nb alloy, and the elongation of the alloy is also higher than that of the general cast alloy. The fracture is debonding along phase boundary and cleavage.

  Info
Periodical
Advanced Materials Research (Volumes 299-300)
Edited by
Jianzhong Wang and Jingang Qi
Pages
167-170
DOI
10.4028/www.scientific.net/AMR.299-300.167
Citation
Y. H. Qi, S. N. Ma, J. T. Guo, "Microstructure and High Temperature Mechanical Property of Directionally Solidified NiAl-Cr(Mo)-W/Nb Alloy", Advanced Materials Research, Vols. 299-300, pp. 167-170, 2011
Online since
July 2011
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Price
$32.00
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