CNT強化アルミニウム合金(Zentallium21)の疲労強度評価

抄録

It is well known that there are a strong correlation Relationship between emission of CO₂ gas and weight of car. Because of that, the weight saving of industrial products are one of the effective means for stopping the global warming. For this purpose, aluminum alloy is one of the candidate materials because of its excellent properties. The method for achieving a high strength aluminum alloy, such as a mechanical milling, a metal matrix compound and so on, have been developed. The carbon nanotube (CNT) reinforced aluminum alloy (Zentallium^®) is a high performance semi-finished products and component parts of mechanically alloyed Al-based materials with sustainable grain-size reduction and strengthening utilizing CNT for commercial application. Carbon nanotubes can exhibit remarkable tensile strength and thermal conductivity, because of their nanostructure and strength of the bonds between carbon atoms. So, the Zentallium^® shows some advantages, such as superlative specific strength, superlative temperature resistance and high stiffness. Although, there are no fatigue and/or fatigue crack propagation data because of new metallic material. In this study, four-point bending fatigue tests were carried out for investigating fatigue properties. It is found that high fatigue resistance properties of the Zentallium^® doesn’t compare with that of old type high-strength aluminum alloy.