Advanced   Register
IMR OpenIR  > 中国科学院金属研究所  > 期刊论文

题名: Effects of Cr content on the microstructure and stress rupture property of a directionally solidified Ni-based superalloy during long-term thermal exposure
作者: Zhang, HW;  Qin, XZ;  Wu, YS;  Zhou, LZ;  Li, XW
发表日期: 2018-3-7
摘要: The effects of Cr addition on the microstructure and stress rupture property during long-term thermal exposure have been investigated in a directionally solidified Ni-based superalloy. The increment of Cr content resulting in the excessive precipitation of s phase is the principal reason for the catastrophic reduction in the stress rupture properties. The amounts of rounded cuboidal gamma' and its coalescence increase, but the tendency of gamma' alignment decreases with the increment of Cr content, which leads to the reduction of the stress rupture property to some degree. The change of lattice misfit shows a good agreement with the change of gamma' morphology and the tendency of gamma' alignment. The change of gamma' shape is accompanied by the increase of the misfit dislocation density, which causes the rise of gamma' coalescence. The increase of Cr content can promote the formation of M23C6 or M6C in the vicinity of degenerating primary MC. Thus, the increased Cr content facilitates the decomposition of primary MC, which deteriorates the stress rupture properties. In addition, the increase of Cr content can promote the formation M23C6 and M6C along gain boundaries (GBs), facilitating the formation of a semicontinuous carbide chain to some degree and broadens GBs and thus promoting the crack nucleation at GBs, which plays a certain role in the degradation of the stress rupture properties.
Appears in Collections:中国科学院金属研究所_期刊论文

Files in This Item:

There are no files associated with this item.

Recommended Citation:
Zhang, HW,Qin, XZ,Wu, YS,et al. Effects Of Cr Content On The Microstructure And Stress Rupture Property Of A Directionally Solidified Ni-based Superalloy During Long-term Thermal Exposure[J]. Materials Science And Engineering A-structural Materials Properties Microstructure And Processing,2018,718:449-460.

SCI Citaion Data:
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Zhang, HW]'s Articles
 [Qin, XZ]'s Articles
 [Wu, YS]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Zhang, HW]‘s Articles
 [Qin, XZ]‘s Articles
 [Wu, YS]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to  Add to Digg  Add to Reddit 
所有评论 (0)
内 容:
Email:  *
验证码:   刷新
标 题:
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.



Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院金属研究所  -Feedback
Powered by CSpace