アルミニウム / シリコンカーバイト傾斜機能材料の圧縮試験とその変形

概要

論文の詳細を見る
A thick-walled ring for Al/SiC functionally gradient material (FGM) was manufactured by the method of centrifugal casting technique. The gradient distribution of SiC powder in the aluminum matrix was confirmed. The SiC powder-distribution profile correlated well with the variation of the vikers microhardness. Compression tests were performed at 300 K, 450 K, 630 K, and 780 K using conventional cylindrical specimens which had a gradient composition toward an alignment of the loading train. The deformation loads for FGM are greater than that for aluminium alloy of the matrix, and the influences of strain rates were observed. A plastic instability of flow softening or negative strain hardening was observed in a high-temperature compression test. Nonuniform barreling was also observed, and the effects of a flow stress gradient caused by the composition gradient were discussed.
一般社団法人日本機械学会の論文
1991-08-25