Simultaneously enhancing strength and ductility of selective laser melted AlSi10Mg via introducing in-cell Al4C3 nanorods
Simultaneously enhancing strength and ductility of selective laser melted AlSi10Mg via introducing in-cell Al4C3 nanorods
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通过引入胞内 Al4C3 纳米棒同时增强选择性激光熔化 AlSi10Mg 的强度和延展性
DOI：
10.1080/21663831.2023.2173028
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发表时间：
2023-02
影响因子：
8.3
通讯作者：
Li J.S.
中科院分区：
文献类型：
--
作者：
Wan J.;Li K.;Geng H.;Chen B.;Shen J.;Guo Y.;Kondoh K.;Bahador A.;Li J.S.
摘要 选择性激光熔化 (SLMed) AlSi10Mg 合金通常在拉伸测试过程中在颈缩之前失效，从而导致延展性不足。为了克服这个问题，我们通过原位化学反应将 Al4C3 纳米棒引入 SLMed AlSi10Mg 的原代 Al 晶胞中。拉伸测试表明，这些细胞内 Al4C3 纳米棒不仅提高了 SLMed AlSi10Mg 的应变硬化能力，而且还延迟了颈缩后的断裂。因此，同时实现了抗拉强度增加 15% 和延展性增加 78%。拉伸后 TEM 分析表明，这些细胞内的 Al4C3 纳米棒在细胞内钉扎并积累位错，从而减轻了沿细胞边界的应力集中。图解摘要影响陈述 通过原位化学反应将 Al4C3 纳米棒引入选择性激光熔化 AlSi10Mg 的初生 Al 晶胞中，同时增强了拉伸强度和延展性。
ABSTRACT Selective laser melted (SLMed) AlSi10Mg alloys usually fail before necking during tensile tests, which results in inadequate ductility. To overcome this problem, here we introduced Al4C3 nanorods into the primary Al cells of SLMed AlSi10Mg via in-situ chemical reaction. Tensile tests revealed that those in-cell Al4C3 nanorods not only increased the strain-hardening ability of SLMed AlSi10Mg but also delayed the fracture beyond necking. Consequently, 15% of tensile strength increase and 78% of ductility increase were achieved simultaneously. Post-tensile TEM analysis revealed that those in-cell Al4C3 nanorods pinned and accumulated dislocations within cells and thus alleviated stress concentration along cell boundaries. GRAPHICAL ABSTRACT IMPACT STATEMENT Al4C3 nanorods were introduced into the primary Al cells of selective laser melted AlSi10Mg via in-situ chemical reaction, which enhanced tensile strength and ductility simultaneously.
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