Effect of preweld microstructure on HAZ liquation cracking of Rene 80 superalloy

被引：21
作者：
Shahsavari, H. A. [1 ]
Kokabi, A. H. [1 ]
Nategh, S. [1 ]
机构：
[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran, Iran
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2007年 / 23卷 / 05期
关键词：
superalloys; HAZ cracking; constitutional liquation; Rene; 80; welding;
D O I：
10.1179/174328407X179539
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The objective of this work was to study the microstructure of as cast, solution treated and overaged Rene 80 superalloy before and after welding treatment. Studies focused on identifying heat affected zone ( HAZ) liquation cracking mechanism and the effect of preweld microstructure on it. The formation of HAZ liquation cracking or microfissuring is found to be strongly dependent on constitutional liquation of grain boundary precipitates. These liquated precipitates in the as cast state contain MC carbides and particularly gamma/gamma' eutectic islands. While in the overaged condition they consist of the MC carbides and borides. Also HAZ grain boundary liquation and subsequent resolidification occur in overaged Rene 80 during welding. MC carbide liquation can be observed at the weldment of solution treated Rene 80 but the intensity of this liquation is not enough for liquid film formation and then cracking. X-ray mapping of MC carbide forming elements, give further evidence on the liquid film formation at hot cracking regions. It shows the enrichment from tungsten and lower amounts of molybdenum and titanium.
引用
收藏
页码：547 / 555
页数：9
相关论文
共 50 条
[31]   Boundary liquation and interface cracking characterization in laser deposition of Inconel 738 on directionally solidified Ni-based superalloy [J].
Zhong, ML ;
Sun, HQ ;
Liu, WJ ;
Zhu, XF ;
He, JJ .
SCRIPTA MATERIALIA, 2005, 53 (02) :159-164
[32]   Influence of aluminide diffusion coating on the tensile properties of the Ni-base superalloy Rene 80 [J].
Rahmani, Kh. ;
Nategh, S. .
SURFACE & COATINGS TECHNOLOGY, 2008, 202 (08) :1385-1391
[33]   Solidification Structure of Superalloy Rene 80 and Variation of Tensile Properties after Heat-Treatment [J].
Woo, Hanbyeol ;
Shin, Jongho ;
Joo, Yunkon ;
Lee, Jehyun .
KOREAN JOURNAL OF MATERIALS RESEARCH, 2020, 30 (12) :678-686
[34]   Microstructural Response of Directionally Solidified Rene 80 Superalloy to Gas-Tungsten Arc Welding [J].
Sidhu, R. K. ;
Ojo, O. A. ;
Chaturvedi, M. C. .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (01) :150-162
[35]   Cracking inhibition of nano-TiC reinforced Rene 104 superalloy fabricated by selective laser melting [J].
Wei, Bing ;
Liu, Zuming ;
Cao, Bin ;
Nong, Bizhong ;
Zhang, Yazhou ;
Ren, Yake ;
Zhou, Huan ;
Wei, Shizhong .
JOURNAL OF ALLOYS AND COMPOUNDS, 2021, 881
[36]   Microstructure Evolution of Laser Repair Welded Rene 77 Nickel-Based Superalloy Cast [J].
Wang, Huei-Sen ;
Huang, Chih-Ying ;
Ho, Kuen-Sen ;
Deng, Sian-Jhih .
MATERIALS TRANSACTIONS, 2011, 52 (12) :2197-2204
[37]   Sub-solidus melting of directionally solidified Rene 80 superalloy during solution heat treatment [J].
R. K. Sidhu ;
O. A. Ojo ;
M. C. Chaturvedi .
Journal of Materials Science, 2008, 43 :3612-3617
[38]   Microstructure and mechanical properties of difficult to weld Rene 77 superalloy produced by laser powder bed fusion [J].
Atabay, Sila Ece ;
Sanchez-Mata, Oscar ;
Muniz-Lerma, Jose Alberto ;
Brochu, Mathieu .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2021, 827
[39]   Effect of heat input on heat affected zone cracking in laser welded ATI Allvac 718Plus superalloy [J].
Idowu, O. A. ;
Ojo, O. A. ;
Chaturvedi, M. C. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 454 :389-397
[40]   Effect of base metal and welding speed on fusion zone microstructure and HAZ hot-cracking of electron-beam welded Inconel 718 [J].
Mei, Yunpeng ;
Liu, Yongchang ;
Liu, Chenxi ;
Li, Chong ;
Yu, Liming ;
Guo, Qianying ;
Li, Huijun .
MATERIALS & DESIGN, 2016, 89 :964-977
12345