在本研究中，雷射箔材 3D 列印（LFP）技術成功用於製造具有高強度和延展性的AZ31B鎂合金，且沒有風險。與雷射粉末床熔融（L-PBF）製程相比，雷射箔材列印技術具有更好的抗氧化性能，並減輕了使用箔作為原料時與鎂相關的潛在爆炸風險。採用雷射功率為 350 W 和掃描速度為 70 mm/s 時，LFP 製造的AZ31B 零件（相對密度約為99.9%）的微觀結構、硬度和拉伸性能進行了表徵。拉伸結果表明，沿著建築方向的最終拉伸強度（UTS）為 282.3 MPa，延伸率（EL）為35.2%，其機械性能優於其他雷射增材製造（LAM）工藝，因為LFP使用的箔材冷卻速度比L-PBF使用的粉末快。透過電子背散射衍射（EBSD）技術，LFP零件的晶粒尺寸比電弧增材製造（WAAM）零件更細，這是由於其更高的冷卻速度。EBSD 的極圖顯示沿著{0001}方向是晶粒的優選取向，這與 X 射線衍射（XRD）圖譜一致。此外，XRD結果顯示LFP零件中沒有出現Mg17Al12化合物，這可能有助於LFP零件的高延展性。

In this study, the laser-foil-printing (LFP) process has been successfully used to manufacture the AZ31B magnesium alloy with high strength and ductility in a risk-free way. Compared to the laser powder bed fusion (L-PBF) processes, the LFP process offers improved resistance to oxidation and mitigates the potential explosive risks associated with magnesium using foil as the feedstock material. The microstructure, hardness, and tensile properties of the LFP-fabricated AZ31B parts (approximately 99.9% relative density) were characterized at a laser power of 350 W and a scanning speed of 70 mm/s. The tensile results indicated that the ultimate tensile strength (UTS) and elongation (EL) in the building direction are 282.3 MPa and 35.2 %, respectively, which possesses superior mechanical properties than other laser additive manufacturing (LAM) processes because the foil used in LFP is cooling faster than the powder used in LAM. Through electron backscatter diffraction (EBSD) technique, the grain size of LFP parts was finer compared to wire-arc additive manufacturing (WAAM) parts, due to its higher cooling rate. The pole figures in EBSD indicate that the direction along {0001} is the preferred grain orientation, which is matched with the X-ray diffraction (XRD) patterns. In addition, the XRD results show that the Mg17Al12 compound does not appear in the LFP parts, which may contribute to the high ductility of the LFP parts.

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