Al-12%Si合金鋳物の熱衝撃性に及ぼすCuおよびMgの影響 Influence of Cu, Mg contents on cyclic thermal shock properties of Al-12%Si alloy castings
Al–Si–X alloy castings are generally used for the parts subjected in thermal environment; for example, automobile engine's piston and cylinder. One of desirable properties for such parts is the littleness of thermal deformation (contour change and surface cracking). In this study, the effect of Cu, Mg contents on cyclic thermal shock (T/S) properties of Al–12% Si alloy castings is investigated from viewpoints of plastic deformation and microstructure. Specimens were subjected under cyclic T/S of rapid cooling in ice water to 500 cycles, and the changes of deformation and specific gravity were measured every 100 cycles. The main result obtained in this study is that about 1% addition of Cu or Mg contributes the cyclic T/S improvement.
軽金属 46(3), 144-149, 1996-03-30
The Japan Institute of Light Metals