2332 マグネシウム合金AZ61Aの半溶融特性(S30 半溶融・半凝固加工の最先端)

概要

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The characteristics of wrought magnesium alloy AZ61A in semi-solid state have been investigated. From the measured cooling curve, it is known that the semi-solid temperature range of AZ61A is between 410℃ and 575℃. The observations of the internal structures under semi-solid temperature reveal that the microstructure of AZ61A becomes coarser and bigger with the rise of heating temperature. When the heating temperature is more than 525℃ (sustained for 3 minutes), the grains become a spherical crystal by gradation. As to the uniaxial compression test, the stress-strain curves can be measured trough room temperature to 520℃. When the heating temperature is above 330℃, the stress-strain curves can draw till the intended strain. But when the heating temperature rises to above 510℃, the liquid component at the grain boundary of the material is increased so that it is unable to bear excessive strain. The peak compression strain decreases gradually with the rise of the temperature in semi-solid temperature range.
一般社団法人日本機械学会の論文
2005-09-18