等通道转角挤压Al-Cu合金的冲击性能  

IMPACT PROPERTIES OF Al-Cu ALLOY SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING

作　　者：房大然[1] 段启强[2] 黄崇湘[2] 吴世丁[2] 张哲峰[2] 李家俊[1] 赵乃勤[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072 [2]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《金属学报》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~~

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.

关 键 词：Al—Cu合金 等通道转角挤压 冲击性能 静力韧度 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG111.7[金属学及工艺—金属材料]