Fabrication of Al-Al3Ti Composites by Friction Stir Processing

摩擦攪拌製程製造Al-Al3Ti複合材料

許芝菁(C. J. Hsu) ； 張期詠(C. Y. Chang) ； 高伯威(P. W. Kao)

《材料科學與工程》 38卷2期 (2006/06) Pp. 70-75

https://doi.org/10.6409/JMSE.200606.0070

摘要

利用摩擦攪拌製程(friction stir processing, FSP)可使鋁與鈦元素粉進行反應，而獲得不同Al3Ti含量之Al-Al3Ti複材。Al3Ti是在摩擦攪拌製程中反應生成且均勻的分散在複材中，其平均顆粒大小爲68-80奈米。而複材中的鋁母材也具有次微米晶粒結構。由於Al3Ti具有高楊氏模數，故此複材具有相當優異之強度。以經由摩擦攪拌製程之Al-15at%Ti爲例，其楊氏模數可達114 GPa而抗拉強度可達525 MPa。

關鍵字

金屬基複合材料 ； 摩擦攪拌製程 ； 次微米晶粒結構

並列摘要

Al-Al3Ti composites with various Al3Ti contents can be fabricated in-situ by friction stir processing (FSP) Al-Ti elemental powder mixtures. The Al3Ti particles, which have an average size of 68-80 nm, are formed in-situ and uniformly distributed in the composite. The aluminum matrix has submicron-grained structure. Due to the high modulus of Al3Ti phase, the composites possess enhanced Young's modulus. For Al-15 at% Ti, the Young's modulus reaches 114 GPa, and the ultimate tensile strength reaches 525 MPa after FSP.

並列關鍵字

metal matrix composites ； friction stir processing ； submicron-grained structure