Effect of G-Phase on the Fracture Behavior of a Welded Joint from Refractory Alloy HP40NbTi

被引：0
作者：
S. Yu. Kondrat’ev
Yu. A. Belikova
M. D. Fuks
M. A. Frolov
S. N. Petrov
机构：
[1] Peter the Great St. Petersburg Polytechnic University,
[2] Gorynin Central Research Institute of Structural Materials “Prometey” of the National Research Center “Kurchatov Institute”,undefined
来源：
Metal Science and Heat Treatment | 2022年 / 64卷
关键词：
heat-resistant austenitic alloys; welded joint; microstructure; phase composition; G-phase; long-term strength; mechanical properties;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The microstructure, the phase composition and the mechanical properties at 20°C and 870°C of a tubular welded joint from alloy HP40NbTi based on the Fe – 25% Cr – 35% Ni system are determined. The mechanism of fracture of the joint under short-term and long-term loading is studied. The role of the G-phase in nucleation and propagation of cracks in the structure of the alloy is revealed. An intermetallic G-phase is shown to form in the heat-affected zone under welding. It is shown that the G-phase lowers the long-term strength of the welded joint of alloy HP40NbTi as compared to the matrix metal.
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页码：34 / 44
页数：10
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