On the Relaxation of a Mismatching Spheroid by Prismatic Loop Punching
نویسندگان
چکیده
When a metal containing elongated inclusions is subjected to a large change of temperature, prismatic dislocations are punched into the matrix to relieve the mismatch stresses induced by the different coefficients of thermal expansion (CTE) of the metal and the inclusion. This phenomenon has been observed in metals reinforced with whiskers (1, 2) and silver chloride containing glass and alumina fibers (3-5). It is also relevant to metals containing submicroscopic second phases of elongated shape, such as S-needles in A1-Cu-Mg, 13'-needles in A1-Mg-Si (6) or V(C,N) and AIN rods in steels (7).
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