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题名: Characterization of stainless steel parts by Laser Metal Deposition Shaping
作者: Zhang K(张凯) ; Wang, Shijie ; Liu WJ(刘伟军) ; Shang XF(尚晓峰)
作者部门: 装备制造技术研究室
关键词: Deposition ; Laser applications ; Mechanical properties ; Morphology ; Optimization ; Powder metals ; Scanning electron microscopy ; X ray diffraction
刊名: Materials and Design
ISSN号: 0261-3069
出版日期: 2014
卷号: 55, 页码:104-119
收录类别: SCI ; EI
产权排序: 2
摘要: Laser Metal Deposition Shaping (LMDS) is a new rapid manufacturing technology, which can build fully-dense metal components directly from the information transferred from a computer file by depositing metal powders layer by layer with neither mould nor tool. Typically, performed with stainless steel (SS) 316 powder, the orthogonal experiments combining with the ideal overlapping model were applied to ascertain the optimal processing parameters. Then the characteristics of microstructure, composition and phase of as-deposited cladding layers were analyzed through Scanning Electron Microscope (SEM) and X-ray diffraction (XRD), as well as relative model. Furthermore, the cooling rate and the solidification velocity during LMDS were evaluated based on empirical method. With the optimal parameters, some parts were fabricated without obvious defects, and then the mechanical properties of them were tested. Finally, the influencing regularities of critical parameters on microstructure and properties were concluded by comparison. The results prove that the microstructure of SS 316 deposits is composed of the slender dendrites growing epitaxially from the substrate, the mechanical properties are favorable and anisotropic, and the composition is uniform. Besides, the microstructure morphology and the mechanical properties are affected by the varied processing parameters at different degrees. Among them, the scanning speed shows the most remarkable effects on microstructure morphology, characteristic microscale, mechanical properties, as well as geometric shape of as-deposited parts.
WOS记录号: WOS:000329118700013
WOS标题词: Science & Technology ; Technology
类目[WOS]: Materials Science, Multidisciplinary
关键词[WOS]: THERMAL-BEHAVIOR ; POWDER ; WIRE ; SOLIDIFICATION ; FABRICATION ; COMPONENTS ; CORROSION
研究领域[WOS]: Materials Science
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内容类型: 期刊论文
URI标识: http://ir.sia.cn/handle/173321/13956
Appears in Collections:装备制造技术研究室_期刊论文

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