HEAT-RESISTANT Al-BASED ALLOY SUPERIOR IN HIGH-TEMPERATURE FATIGUE PROPERTY

摘要

PROBLEM TO BE SOLVED: To provide a heat-resistant Al-based alloy which is lightweight, and has superior high-temperature toughness, abrasion resistance, and high-temperature fatigue properties besides.;SOLUTION: The Al-based alloy has a structure comprising an intermetallic compound phase of 50 to 90% by a volume fraction and the balance being a metallic Al matrix. Pools of the metallic Al, which are divided by the intermetallic compound phases, have a maximum length of 40 μm or less by average, when the structure is observed with a magnification of 500 times through a scanning electron microscope. Thus produced Al-based alloy has improved high-temperature toughness, abrasion resistance, and simultaneously high-temperature fatigue properties.;COPYRIGHT: (C)2006,JPO&NCIPI