Abstract In this study, a 1.0 mm thick (Zr48Cu32Al8Ag8,Ta4)Si0.75 alloy composite (AC) plate was laser remelted (LR) by employing the Nd:YAG laser technique. To fully remelt the plate, a two-sided welding process with preselected parameters was employed. The microstructure, mechanical (microhardness), thermal properties, and corrosion resistance (potentiodynamic polarization) of the laser remelted alloy composite (LR-AC), the Zr-Cu AC (with the crystalline structure), and the Zr-Cu based bulk metallic glass composite (BMGC, the same composition as the AC. The amorphous matrix is produced by a rapid cooling rate) were then investigated and compared. The test results show that after the laser remelting processes, the LR-AC consisted of an amorphous matrix and reinforced phase, Ta, in the remelted areas, which is similar to the BMGC; however, the volume fractions and grain size of the micro-sized reinforced phase, Ta, in the LR-AC were reduced. When compared to those of the BMGC, the GFA indices of LR-AC were slightly improved. For the hardness tests, LR-AC showed a similar hardness to that of the BMGC; however, a higher value was obtained when compared to that of the AC. Furthermore, the LR-AC exhibits a lower Icorr (a slower corrosion rate), which is attributed to the amorphous matrix and less micro-sized Ta content, eliminating corrosion occurring between the Ta and the matrix of the alloy.

中文翻译：

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激光重熔工艺在Zr-Cu基合金复合材料中的应用

摘要 在本研究中，采用 Nd:YAG 激光技术对 1.0 mm 厚的 (Zr48Cu32Al8Ag8,Ta4)Si0.75 合金复合 (AC) 板进行了激光重熔 (LR)。为了完全重熔钢板，采用了具有预选参数的双面焊接工艺。激光重熔合金复合材料 (LR-AC)、Zr-Cu AC（具有晶体结构）和 Zr-Cu 基块状金属的微观结构、机械（显微硬度）、热性能和耐腐蚀性（动电位极化）然后对玻璃复合材料（BMGC，与 AC 的成分相同。无定形基体由快速冷却速率产生）进行研究和比较。测试结果表明，经过激光重熔处理后，LR-AC在重熔区域由非晶基体和增强相Ta组成，与BMGC相似；然而，LR-AC 中微细增强相 Ta 的体积分数和晶粒尺寸降低。与 BMGC 相比，LR-AC 的 GFA 指数略有提高。对于硬度测试，LR-AC 显示出与 BMGC 相似的硬度；然而，与 AC 相比，获得了更高的值。此外，LR-AC 表现出较低的 Icorr（较慢的腐蚀速率），这归因于非晶基体和较少的微尺寸 Ta 含量，消除了 Ta 与合金基体之间发生的腐蚀。与 AC 相比，获得了更高的值。此外，LR-AC 表现出较低的 Icorr（较慢的腐蚀速率），这归因于非晶基体和较少的微尺寸 Ta 含量，消除了 Ta 与合金基体之间发生的腐蚀。与 AC 相比，获得了更高的值。此外，LR-AC 表现出较低的 Icorr（较慢的腐蚀速率），这归因于非晶基体和较少的微尺寸 Ta 含量，消除了 Ta 与合金基体之间发生的腐蚀。