摘要
对铸态Al-0.63%Cu和Al-3.9%Cu(质量分数)合金进行等通道转角挤压处理,研究了Al-Cu合金冲击性能的变化.结果表明,等通道转角挤压增强了Al-0.63%Cu合金的冲击性能;而对于Al-3.9%Cu合金,虽然晶粒细化和第二相的弥散分布使其强度增加,但较多的第二相θ(Al_2Cu)未提高其冲击性能.该合金的冲击吸收功与其静力韧度有关.
Impact properties of the casting Al-0.63%Cu and Al-3.9%Cu （mass fraction） alloys subjected to equal channel angular pressing （ECAP） were investigated. It is found that the impact properties of Al-0.63%Cu alloy were enhanced after ECAP, while for Al-3.9%Cu alloy, its impact toughness was not improved due to more 0 （Al2Cu） phases, although the tensile strength increased because of grain refinement and dispersive precipitation of the second-phase. It is shown that the impact toughness is dependent on the static toughness of the Al-Cu alloys.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第12期1251-1255,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金项目50571102和50625103资助~~
关键词
Al—Cu合金
等通道转角挤压
冲击性能
静力韧度
Al-Cu alloy, equal channel angular pressing （ECAP）, impact properties, static toughness
