Microstructure, grain growth behavior and mechanical properties of W-CoCuFeNi tungsten heavy alloys prepared by infiltration

2021 ◽  
pp. 105572
Author(s):  
Huan Ma ◽  
Yang Shao ◽  
Chan Hung Shek
Keyword(s):  
Mechanical Properties ◽  
Grain Growth ◽  
Growth Behavior ◽  
Heavy Alloys ◽  
Tungsten Heavy Alloys ◽  
Grain Growth Behavior

scholarly journals Grain growth behavior of tungsten heavy alloys based on the master sintering curve concept

2006 ◽  
Vol 37 (11) ◽  
pp. 3337-3346 ◽  
Author(s):  
S. J. Park ◽  
J. M. Martin ◽  
J. F. Guo ◽  
John L. Johnson ◽  
Randall M. German
Keyword(s):  
Grain Growth ◽  
Growth Behavior ◽  
Heavy Alloys ◽  
Tungsten Heavy Alloys ◽  
Grain Growth Behavior

scholarly journals Effect of Cold-Deformation on Austenite Grain Growth Behavior in Solution-Treated Low Alloy Steel

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1004 ◽  
Author(s):  
Xianguang Zhang ◽  
Kiyotaka Matsuura ◽  
Munekazu Ohno
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Grain Growth ◽  
Cold Deformation ◽  
Growth Behavior ◽  
Low Alloy Steel ◽  
Solution Treated ◽  
Austenite Grain ◽  
Grain Growth Behavior ◽  
Austenite Grain Growth

The occurrence of abnormal grain growth (AGG) of austenite during annealing is a serious problem in steels with carbide and/or nitride particles, which should be avoided from a viewpoint of mechanical properties. The effects of cold deformation prior to annealing on the occurrence of AGG have been investigated. It was found that the temperature range of the occurrence of AGG is shifted toward a low temperature region by cold deformation, and that the shift increases with the increase of the reduction ratio. The lowered AGG occurrence temperature is attributed to the fine and near-equilibrium AlN particles that are precipitated in the cold-deformed steel, which is readily dissolved during annealing. In contrast, coarse and non-equilibrium AlN particles precipitated in the undeformed steel, which is resistant to dissolution during annealing.

Grain Growth Behavior and Mechanical Properties of the Friction Stir Welded Zone of 7055 Al Alloy Followed by Post Weld Heat Treatment

2007 ◽  
Vol 539-543 ◽  
pp. 4087-4092 ◽  
Author(s):  
Won Bae Lee ◽  
Chang Yong Lee ◽  
Yun Mo Yeon ◽  
Jong Bong Lee ◽  
Shur Chang Chae ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Grain Growth ◽  
Weld Zone ◽  
Growth Behavior ◽  
Post Weld Heat Treatment ◽  
Friction Stir ◽  
Input Condition ◽  
Lower Heat ◽  
Grain Growth Behavior

The grain growth behavior and mechanical properties in the friction stir weld zone after post weld heat treatment (PWHT) have been investigated. As PWHT temperature increased, a normal grain growth of as-welded equaxied grains ceased and abnormally grown grains with elongated shape coarsened. Huge elongated grains changed into smaller equaxied grains at 500°C. In case of lower heat input condition, abnormal grain growth initiated faster due to smaller initial grain size. The weld zone with bigger initial grains had advantages to maintain the thermal stability at high temperature. The hardness near the weld zone was almost recovered to the 95% of the unaffected base metal at 500 °C and the weld zone under lower heat input condition resulted in the homogeneous recovery through the whole weld zone.

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