The effect of weld Heat-Affected zone (HAZ) liquation kinetics on the hot cracking susceptibility of alloy 718

1993 ◽  
Vol 24 (6) ◽  
pp. 1409-1422 ◽  
Author(s):  
B. Radhakrishnan ◽  
R. G. Thompson
Keyword(s):  
Heat Affected Zone ◽  
Hot Cracking ◽  
Alloy 718 ◽  
Weld Heat

Microfissuring of Alloy 718 in the Weld Heat-Affected Zone

JOM ◽  
1988 ◽  
Vol 40 (7) ◽  
pp. 44-48 ◽  
Author(s):  
R. G. Thompson
Keyword(s):  
Heat Affected Zone ◽  
Alloy 718 ◽  
Weld Heat

scholarly journals Varestraint Testing of Selective Laser Additive Manufactured Alloy 718—Influence of Grain Orientation

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1113 ◽  
Author(s):  
Tahira Raza ◽  
Joel Andersson ◽  
Lars-Erik Svensson
Keyword(s):  
Weld Metal ◽  
Heat Affected Zone ◽  
Grain Orientation ◽  
Hot Cracking ◽  
Alloy 718 ◽  
High Angle ◽  
Electron Backscattered Diffraction ◽  
Varestraint Testing ◽  
Significant Difference ◽  
Haz Cracking

The effect of grain orientation on hot cracking susceptibility of selective laser additive manufactured Alloy 718 was investigated by Varestraint testing. Electron backscattered diffraction showed that cracks in heat affected zone (HAZ) of the welded samples occurred in high angle grain boundaries. The extent of HAZ cracking was smaller in samples tested parallel to the elongated grain orientation and larger in samples transverse to the elongated grain orientation. However, for solidification cracking in the weld metal, no significant difference with respect to grain orientation in the base metal was found.

Morphology of weld heat-affected zone liquation in cast alloy 718

Metallography ◽  
1986 ◽  
Vol 19 (3) ◽  
pp. 371-379 ◽  
Author(s):  
W.A. Baeslack ◽  
D.E. Nelson
Keyword(s):  
Heat Affected Zone ◽  
Cast Alloy ◽  
Alloy 718 ◽  
Cast Alloy 718 ◽  
Zone Liquation ◽  
Weld Heat

Hot Cracking Susceptibility of Nickel Base Alloy 718

1997 ◽  
Vol 30 (3) ◽  
pp. 14
Author(s):  
V. Shankar ◽  
G. Srinivasan ◽  
B. G. Muralidharan ◽  
T. P. S. Gill ◽  
V. K. Sethi
Keyword(s):  
Base Alloy ◽  
Hot Cracking ◽  
Alloy 718 ◽  
Nickel Base Alloy ◽  
Nickel Base

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.

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