Effect of aging treatment on the microstructural evolution and mechanical properties of Co-free maraging steel manufactured by wire arc directed energy deposition
Source abstract
Abstract
In this study, a Co-free maraging steel was fabricated using the wire arc directed energy deposition technique and the effect of aging treatment on the microstructural evolution as well as the mechanical properties was investigated. The microstructure consisted of martensite and a small amount of austenite both before and after aging treatment. Due to the reverse transformation of austenite, the volume fraction of austenite in the aged samples increased. Additionally, aging treatment is able to enhance the texture characteristics of the martensite. During this process, the grain size remained largely unchanged, and the elements between the dendrites did not redistribute. Due to the precipitation of Ni 3 Ti nanoparticles after aging, the microhardness, yield strength, and ultimate tensile strength of the aged state increased by 30.1 %, 34.8 %, and 13.7 %, respectively, while the elongation after fracture remained essentially unchanged. The increase in yield strength is primarily attributed to the precipitation strengthening effect of the nanoscale precipitates.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · High Entropy Alloys Studies · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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