Effects of TiB₂ particles on microstructure and mechanical properties of an in-situ TiB₂-Al-Cu-Li matrix composite

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• 作者：Yanwei Shen ; Xianfeng Li ; ^{brucelee75cn@sjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Tianran Hong ; Jiwei Geng ; Haowei Wang
• 关键词：Metallic composites ; Al&ndash ; Cu&ndash ; Li alloy ; In-situ TiB2 particles ; Microstructure ; Mechanical property
• 刊名：Materials Science & Engineering A
• 出版年：2016
• 出版时间：8 February 2016
• 年：2016
• 卷：655
• 期：Complete
• 页码：265-268
• 全文大小：1753 K

文摘

The microstructure and mechanical properties of an in-situ TiB₂ particles reinforced Al–3.3Cu–1.0Li–0.60Mg–0.40Ag–0.14Zr matrix composite were investigated in the naturally aged condition, together with those of the unreinforced alloy following an identical processing and aging history. With the introduction of sub-micro/nano-sized TiB₂ particles, the precipitation of δ′ (Al₃Li) was promoted in the composite in comparison with the unreinforced alloy. The composite exhibited the smaller grain size, higher elastic modulus, enhanced yield strength, ultimate tensile strength, and superior Vickers hardness over the unreinforced alloy.