Analysis of creep fracture in Al-Al₄C₃ composite after ECAP

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• 作者：Ferdinand Dobeš ; ^a ; ^dobes@ipm.cz ; Michal Besterci^b ; Beá ; ta Balló ; ková ; ^b ; Katarí ; na Sű ; lleiová ; ^b ; Petr Dymá ; č ; ek^a
• 关键词：Aluminum alloys ; Equal channel angular processing ; Mechanical alloying ; Fracture
• 刊名：Materials Science and Engineering: A
• 出版年：2012
• 出版时间：15 January 2012
• 年：2012
• 卷：532
• 期：Complete
• 页码：567-572
• 全文大小：760 K

文摘

Creep fracture of a composite based on an aluminum matrix reinforced by 4 vol. % Al₄C₃ was studied at temperatures of 623 and 723 K by small punch testing with a constant force. The composite was tested in state after equal channel angular pressing (ECAP) by two passes of route C as a final operation. It was found that the time to fracture was inversely proportional to the minimum deflection rate in a similar manner as the corresponding quantities in conventional creep tests. The fractured surfaces of the studied materials had largely intercrystalline character.