Loading...

The effect of thermal exposure on the γ′ characteristics in a Ni-base superalloy

Sharghi Moshatghin, R ; Sharif University of Technology | 2004

151 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/S0925-8388(03)00699-6
  3. Publisher: 2004
  4. Abstract:
  5. In this investigation, changes in γ′ characteristics in superalloy IN-738LC during aging are presented. The SEM studies revealed that coarsening kinetics of γ′ follows a linear law at different aging time for different temperatures. Whereas when coarsening of secondary γ′ is studied, it was found that at the early stage of aging, volume fraction of secondary γ′ is high, leading to short inter-particle distances. In this condition interfacial energy is dominant and variation of [r3-r03] as a function of aging time is linear. As the coarsening proceeds, volume fraction of secondary γ′ decreases and elastic interaction energy becomes dominant. In such case a deviation in variation of [r3-r03] versus aging time was observed. © 2003 Published by Elsevier B.V
  6. Keywords:
  7. Aging ; Coarsening ; Ni-base superalloy ; Secondary γ′
  8. Source: Journal of Alloys and Compounds ; Volume 368, Issue 1-2 , 2004 , Pages 144-151 ; 09258388 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925838803006996