Linear friction welding of a single crystal superalloy

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Proceedings titleMaterials Science Forum
Conference7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011, 1 August 2011 through 5 August 2011, Quebec City, QC
Pages30223027; # of pages: 6
SubjectForging pressures; Linear friction welding; Microhardness testing; Microstructural examination; Microstructural features; Ni-based superalloys; Parent materials; Recrystallized grains; Single crystal Ni-based superalloys; Single crystal superalloys; Thermomechanically affected zones; Weld zone; Welded materials; Friction welding; Microstructural evolution; Recrystallization (metallurgy); Single crystals; Strength of materials; Superalloys; Welds; Crystal orientation; Friction; Tribology; Welding
AbstractThe effect of forging pressure on linear friction welding (LFW) behaviour of a single crystal Ni-based superalloy was investigated. Crystal orientations of the specimens were controlled and results indicated that welding success is dependent on proximity of the oscillation direction to the <011> direction. Characterization of the welds included optical examination of the microstructural features of the weld and thermomechanically affected zones (TMAZ) in relation to the parent material. Mechanical properties of the welded material examined via microhardness testing showed an increase in strength in the weld zone (WZ). Microstructural examination indicated that some recrystallization occurred in the WZ, as well as a small amount of distortion of the dendrites in the TMAZ. With increased forge pressure, recrystallized grains remaining in the weld were minimized. © 2012 Trans Tech Publications, Switzerland.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace
Peer reviewedYes
NPARC number21269370
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Record identifier24949def-39bf-425f-b046-4fc731a8a0ae
Record created2013-12-12
Record modified2016-05-09
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