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

题名: Microstructures and intermediate temperature brittleness of newly developed Ni-Fe based weld metal for ultra-supercritical power plants
作者: Wu, Dong;  Li, Dianzhong;  Lu, Shanping
发表日期: 2017-1-27
摘要: Temperature dependent tensile behavior of Ni-Fe based weld metal by gas tungsten arc welding (GTAW) was evaluated in the range of 350-820 degrees C at a strain rate of 0.035/min. Intergranular fracture and intermediate temperature brittleness (ITB) took place at around 750 degrees C. The microstructure and the fracture surface morphology observation by optical microscopy, scanning and transmission electron microscopy showed that the ITB to a large extent depended on the grain boundary sliding (GBS) and the gamma prime (gamma') precipitation during the elevated temperature tensile deformation. X-ray diffraction (XRD) confirmed that the primary phases formed during the last stage of solidification were mainly TiN nitrides, MC carbides, and Laves phases in the form of Laves/gamma eutectics. Quantitative statistics of the Laves/gamma eutectics and the MX(MC, TiN) phases were processed. These primary phases had a pinning effect on the migration of grain boundaries and accordingly made the grain boundaries tortuous. The tortuous grain boundaries were expected to inhibit the GBS, relieving ITB. Transmission electron microscopy confirmed that fine Laves particles precipitated along the grain boundary in the weld metal with higher Mo content during the deformation process, and these Laves particles were also supposed to be one factor for inhibiting the GBS.
刊名: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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:
Wu, Dong,Li, Dianzhong,Lu, Shanping. Microstructures And Intermediate Temperature Brittleness Of Newly Developed Ni-fe Based Weld Metal For Ultra-supercritical Power Plants[J]. Materials Science And Engineering A-structural Materials Properties Microstructure And Processing,2017,684:146-157.

SCI Citaion Data:
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Wu, Dong]'s Articles
 [Li, Dianzhong]'s Articles
 [Lu, Shanping]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Wu, Dong]‘s Articles
 [Li, Dianzhong]‘s Articles
 [Lu, Shanping]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
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 © 2007-2017  中国科学院金属研究所  -Feedback
Powered by CSpace