Study on microstructure and properties of super martensitic stainless steel fabricated by hot wire laser additive manufacturing
Source abstract
Abstract
To address the deposition efficiency and heat input limitations of Cold Wire-Laser Metal Deposition (CW-LMD), this study investigates the Hot Wire-Laser Metal Deposition (HW-LMD) of Super Martensitic Stainless Steel (SMSS). A comparative analysis of microstructure and mechanical properties reveals that the HW-LMD process significantly refines martensite grains, reducing grain size by 32%–43% compared to CW-LMD. Additionally, HW-LMD samples exhibit lower Kernel Average Misorientation (KAM) values, indicating reduced lattice distortion. Although the average hardness (291.6 HV) and tensile strength (>900 MPa) of HW-LMD samples are marginally lower than those of CW-LMD, ductility is notably improved, achieving a maximum elongation of 20.7%. These findings demonstrate that HW-LMD effectively optimizes the strength-toughness balance in SMSS components through microstructural refinement and uniform heat input.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · High Entropy Alloys Studies · Welding Techniques and Residual Stresses
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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