Study on very high cycle fatigue properties of forged TC4 titanium alloy treated by laser shock peening under three-point bending
Source abstract
Abstract
Abstract Three-point bending ultrasonic fatigue tests were performed on forged TC4 titanium alloy with different laser shock peening treatments. The results show that HCF properties are improved, while VHCF properties deteriorate after 4.6 J impact for 3 times. The fatigue fracture shows a transgranular quasi-cleavage mode with facets on the surface or subsurface, which are caused by cleavage and slip of αp grains, and laser shock peening causes the crack origin zone to shift sideways. Residual compressive stress and surface nanocrystals have a combined fatigue strengthening effect, while excessive grain refinement and subsurface failure mechanism weakens the fatigue properties.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Surface Treatment and Residual Stress · High-Velocity Impact and Material Behavior · Erosion and Abrasive Machining
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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