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No.17 (1979/03) >

 
Title :一方向凝固させたAl-Cu共晶合金の破壊様式と引張強度
Title alternative :Fractography and Tensile Strength of the Unidirectionally Solidified Al-Cu Eutectic Alloy
Authors :糸村, 昌祐
平敷, 兼貴
村山, 哲郎
Authors alternative :Itomura, Shosuke
Heshiki, Kenki
Murayama, Tetsuro
Issue Date :1-Mar-1979
Abstract :To study the behavior of fracture of unidirectional solidified Al-CuAl₂ eutectic composites, the specimens with varying solidification rate, 1mm/hr~50mm/hr, were prepared by means of Bridgman method. Most of all specimens showed well-regulated lamellar eutectic structure; i.e., aluminum rich matrix and CuAl₂ lamellae were parallel to the longitudinal direction of the specimen, with few exceptions, e.g., banding structure, degenerate structure produced at the lower solidification rate. Tensile testing of these specimens revealed that the failure occured by a transverse cleavage of CuAl₂ platelets and a shear fracture of the matrix between cracks on adjacent CuAl₂ platelets. There are many cracks in the CuAl₂ lamellae near the final fracture surface, but the distribution of platelet cracks was not uniform. The tensile strength of the specimen obtained was about 24kg/mm², and this actual strength showed good agreement with the Kelly-Tyson discontinuous-fiber composite relations.
Type Local :紀要論文
ISSN :0387-429X
Publisher :琉球大学理工学部
URI :http://hdl.handle.net/20.500.12000/27536
Citation :琉球大学理工学部紀要. 工学篇 = Bulletin of Science & Engineering Division, University of the Ryukyus. Engineering no.17 p.1 -13
Appears in Collections:No.17 (1979/03)

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