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With the advancements of modern manufacturing, heavy equipment has grown rapidly and significantly in size, performance, and integration, thereby increasing the demand for manufacturing technology [1–6]. Large components are vulnerable to failures under harsh working conditions [7–9]. This results in the scrapping of entire components, failure, increased production cost, and material waste. Traditional metal forming techniques include casting [10, 11], forging [12, 13], welding [14, 15], and milling [16, 17]. However, problems such as low processing efficiency [18, 19], multiple assembly procedures [20, 21], and high production costs persist [22, 23]. In recent years, additive manufacturing (AM) technology has developed rapidly, with the advantages of layer-by-layer accumulation of materials and rapid formation of arbitrarily complex parts [24–27]. Laser directed energy deposition (LDED) is an AM process in which a focused laser is used to fuse materials by melting as they are deposited [28–31]. Specifically, LDED is performed by predefining the structure of a part using slicing software, melting the metal powder into a molten pool using a high-energy laser, and producing the part layer-by-layer.

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Effect of the Melt Pool In-Situ Control on the Microstructure of Laser Directed Deposition 316L Stainless Steel Thin-Walled Parts

  • 章节

  • 发表日期：

    2026年

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  • Kaiyu Luo,
  • Youyu Su,
  • Jinzhong Lu

摘要

With the advancements of modern manufacturing, heavy equipment has grown rapidly and significantly in size, performance, and integration, thereby increasing the demand for manufacturing technology [1–6]. Large components are vulnerable to failures under harsh working conditions [7–9]. This results in the scrapping of entire components, failure, increased production cost, and material waste. Traditional metal forming techniques include casting [10, 11], forging [12, 13], welding [14, 15], and milling [16, 17]. However, problems such as low processing efficiency [18, 19], multiple assembly procedures [20, 21], and high production costs persist [22, 23]. In recent years, additive manufacturing (AM) technology has developed rapidly, with the advantages of layer-by-layer accumulation of materials and rapid formation of arbitrarily complex parts [24–27]. Laser directed energy deposition (LDED) is an AM process in which a focused laser is used to fuse materials by melting as they are deposited [28–31]. Specifically, LDED is performed by predefining the structure of a part using slicing software, melting the metal powder into a molten pool using a high-energy laser, and producing the part layer-by-layer.