Micro-yield behaviors of Al 2-O 3-SiO 2(sf)/Al-Si metal matrix composites

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. 2; pp. 307 - 312
• Main Authors: LIU, Guan-jun, LI, Wen-fang, PENG, Ji-hua, DU, Jun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2007
• Subjects: Al-Si metal matrix composite; alumina silicate short fibers; heat treatment; micro-yield strength; alumina silicate short fibers; heat treatment; Al-Si metal matrix composite; micro-yield strength
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(07)60090-9

Effects of the volume fraction and the size of crystallized alumina silicate short fibers as well as heat treatment processes on micro-yield strength(MYS) of Al 2-O 3-SiO 2(sf)/Al-Si metal matrix composite(MMC) that was fabricated by squeezing cast, were investigated by using continuous loading method on an Instron 5569 tester with a special extensometer with an accuracy of 10 −7. The results show that MYS of MMC decreases with the increase of volume fraction and length of the alumina silicate short fibers in the metal matrix composite, respectively. MYS of quenched Al 2-O 3-SiO 2(sf)/Al-Si MMC is the lowest, MYS of the MMC through peak-aging treatment is higher than that through other heat treatment methods. And before the peak-aging, MYS of MMC aging treated gradually increases with the increase of the aging time. Aging treatment after solution treatment is a preferred way that enhances micro and macro-yield strength of Al 2-O 3-SiO 2(sf)/Al-Si MMC.