scholarly journals Hot Ductility Behavior in the Weld Heat-Affected Zone of Austenitic Fe-Mn-Al-C Lightweight Steels and the Effects of Alloying Elements

2021 ◽  
Author(s):  
Joonoh Moon
Keyword(s):  
Heat Affected Zone ◽  
Alloying Elements ◽  
Hot Ductility ◽  
Weld Heat

Metallurgical Factors Influencing Hot Ductility of Austenitic Steel Piping at Weld Heat-Affected Zone Temperatures

1963 ◽  
Vol 85 (2) ◽  
pp. 151-164 ◽  
Author(s):  
T. M. Cullen ◽  
J. W. Freeman
Keyword(s):  
Liquid Phase ◽  
Austenitic Steel ◽  
Heat Affected Zone ◽  
Variable Temperature ◽  
Hot Ductility ◽  
Carbon And Nitrogen ◽  
Factors Influencing ◽  
Nitrogen Contents ◽  
Steel Piping ◽  
Weld Heat

The variable hot ductility of wholly austenitic Type 347 steel was found to be associated with the variable temperature of formation of a liquid phase (liquation temperature) in the microstructure of the steel. In wholly austenitic materials a low liquation temperature leads to poor hot ductility. The liquation temperature of the steel was determined to be a function of its columbium, carbon, and nitrogen contents. When ferrite is present in the steel, poor hot ductility can also occur as a result of the crack sensitivity of the two-phased structure.

scholarly journals Properties of a thick-section narrow-gap gas tungsten arc weld of cast Haynes 282

2021 ◽  
Author(s):  
Michael Santella ◽  
X. Frank Chen ◽  
Philip Maziasz ◽  
Jason Rausch ◽  
Jonathan Salkin
Keyword(s):  
Base Metal ◽  
Heat Affected Zone ◽  
Reference Data ◽  
Filler Metal ◽  
Stress Rupture ◽  
Narrow Gap ◽  
Weld Deposit ◽  
Gas Tungsten Arc ◽  
Gas Tungsten ◽  
Weld Heat

AbstractA 50.8-mm-deep gas tungsten arc weld was made with matching filler metal in cast Haynes 282 alloy. The narrow-gap joint was filled with 104 weld beads. Visual and dye-penetrant inspection of cross-weld specimens indicated that the cast base metal contained numerous casting defects. No visible indications of physical defects were found in the weld deposit. The weld heat-affected zone was characterized by microcracking and localized recrystallization. The cause of the cracking could not be determined. Hardness testing showed that a softened region in the as-welded heat-affected zone was nearly eliminated by post-weld heat treatment. Tensile testing up to 816 °C showed that cross-weld specimen strengths ranged from 57 to 79% of the cast base metal tensile strength. The stress-rupture strengths of cross-weld specimens are within 20% of base metal reference data. Failures of both tensile and stress-rupture specimens occurred in the base metal.

Statistical model of cleavage fracture in granular bainite in simulated weld heat affected zone

1989 ◽  
Vol 5 (9) ◽  
pp. 913-917 ◽  
Author(s):  
X. X. Xu ◽  
Q. G. Cai ◽  
Y. Su ◽  
C. X. Hou ◽  
W. D. Ma
Keyword(s):  
Statistical Model ◽  
Cleavage Fracture ◽  
Heat Affected Zone ◽  
Granular Bainite ◽  
Weld Heat
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