Affordable Access

Publisher Website

Influence of Y on stress rupture property of a Ni-based superalloy

Materials Science and Engineering A
Publication Date
DOI: 10.1016/j.msea.2012.04.117
  • Stress Rupture
  • Nickel-Based Superalloys
  • Grain Boundaries
  • Fracture
  • Yttrium


Abstract This paper focuses on the influence of Y on the stress rupture properties of a Ni-based superalloy. It also gives reasons for stress rupture life decrease caused by excessive Y doping. It has been shown that the stress rupture lives are strongly dependent on Y concentrations. The stress rupture is low for the undoped alloy and increases through a maximum from 0.009 to 0.014wt.% Y. The microstructures of the alloys have been studied by means of SEM, TEM and EDS. When an excessive amount of Y is introduced, some BCC structured Al2Ni6Y3 phases precipitate in the vicinity of the grain boundaries. Fractographic evaluations reveal that cracks originate around Al2Ni6Y3, leading to premature failure of the stress rupture specimens. There is also some fine cubic γ′ within the Al2Ni6Y3 phase.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Influence of Ru addition on microstructure and str...

on Progress in Natural Science Ma...

Improvement of stress–rupture property by Cr addit...

on Materials Science and Engineer... Jan 01, 2011

Microstructure and stress rupture property of Ni-b...

on Journal of Alloys and Compound... Jan 01, 2009

Influence of element Re on lattice misfits and str...

on Materials Science and Engineer... Jan 01, 2010
More articles like this..