Enhancing damage-resistance in low carbon martensitic steels upon dual-pass laser treatment
| Autor: | Cemal Cem Tasan, Hyun Seok Oh, Jiyun Kang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Austenite Materials science Scanning electron microscope Mechanical Engineering Metals and Alloys 02 engineering and technology Lath engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Characterization (materials science) Mechanics of Materials Martensite 0103 physical sciences engineering Surface roughness General Materials Science Composite material 0210 nano-technology Material properties |
| Zdroj: | Scripta Materialia. 192:13-18 |
| ISSN: | 1359-6462 |
| Popis: | The fast development of various additive manufacturing processes is motivating research to improve microstructure control during laser assisted treatments, in order to spatially vary material properties on engineering components. In the present work, we demonstrate that a dual-pass laser treatment applied to a low carbon lath martensitic steel can simultaneously repair solidification or fatigue cracks, reduce surface roughness, and, most importantly, trigger phase transformations to create a more damage-resistant microstructure, namely, one that includes interlath austenite. We investigate these influences employing various scanning electron microscopy and transmission high energy X-ray diffraction analyses, mechanical characterization tests, and discuss the underlying mechanisms. |
| Databáze: | OpenAIRE |
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