Effect of heat treatment on microstructure and fracture toughness of Ti–6Al–4V alloy by forging-additive hybrid manufacturing
Source abstract
Abstract
The technology of forging-additive hybrid manufacturing can provide an effective solution for innovative structural fabrication, which has combined the advantages of forging in efficiency and additive manufacturing in flexibility. In this study, laser-based directed energy deposition (DED) technology was employed to deposit bulk samples on a forged Ti–6Al–4V substrate. Microstructures evolution and strengthening mechanism of fracture toughness on the bonding zone under different heat treatments were studied. Not like fine α was favorable to enhance the value of microhardness, wide α laminar or wide α cluster containing thick lath α can impede crack propagation effectively, a regression formula was acquired between α lath width and fracture toughness. Therefore, when the heat treatment was implemented over the β-transus temperature (Tβ), sample’s microstructure was transformed into widmanstatten structure which retarded the crack propagation, and attained the highest fracture toughness compared with other heat treatment processes.Graphical abstract
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Titanium Alloys Microstructure and Properties · Additive Manufacturing Materials and Processes · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
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