摘要
镁基材料由于其较低的密度而主要用于开发轻质结构;同时,镁合金还具有优良的生物相容性,因此也用作骨替代植入物的生物可降解吸收材料。这些优势使得镁基材料在汽车、航空航天和生物医学领域的应用越来越广泛。而选区激光熔化(Selective laser melting,SLM)作为主要的增材制造技术之一,能够制造传统加工方法难以加工的个性化定制、结构复杂的金属部件。同时,随着各大巨头公司广泛涉足SLM加工领域,逐步开发SLM技术优势,相信该技术很快就会打开市场。因此,采用SLM技术制备镁基材料几乎势在必行。本文回顾了镁及镁基复合材料SLM的最新进展,详细讨论了SLM工艺参数和粉末性能对镁基材料成型质量、致密化以及力学性能的影响,总结了主要研究结果并指出了未来SLM方法制备镁基材料的方向和面临的挑战。
Magnesium-based materials are mainly used for the development of lightweight structures due to their lower density. At the same time, magnesium alloys also have excellent biocompatibility and are therefore also used as biodegradable absorbent materials for bone replacement implants. These advantages make magnesium-based materials more and more widely used in the automotive, aerospace and biomedical fields. Selective laser melting(SLM), as one of the major additive manufacturing technologies, enables the manufacture of individually customized, structurally complex metal parts that are difficult to process in conventional processing methods. At the same time, as the major giants are widely involved in SLM processing and develop SLM technology, it is believed that they will soon open up the market. Therefore, the preparation of magnesium-based materials using SLM technology is almost imperative. This paper reviews the latest developments of magnesium and magnesium-based composite materials SLM, and discusses in detail the effects of SLM process parameters and powder properties on the molding quality, densification and mechanical properties of magnesium-based materials, summarizes the main research results and points out the direction and challenges for preparation of magnesium-based materials by SLM methods.
引文
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