摘要
研究了C2Cl6除气剂-超声联合处理对铝合金(Al-3.06%Si,Al-3.21%Mg和2024合金)氢含量及2024合金力学性能的影响。结果表明:联合处理可大幅度缩短超声除气时间。联合除气后对2024合金力学性能影响很大:铸锭的抗拉强度及延伸率比未除气时分别提高了28.3%及92.3%(最大增幅),除气处理对2024合金的屈服强度影响很小,仅提高6.7%(最大增幅)。另外,除气后断裂方式从脆性断裂向微孔聚集型断裂转变,最终提高了力学性能。
The effects of combined C2Cl6 degasser and ultrasonic treatment on the hydrogen content in the Al-3.06%Si, Al-3.21%Mg and 2024 aluminum alloys and the mechanical properties of 2024 aluminum alloy were studied. The results show that the degassing time with a single ultrasonic treatment is greatly shortened by the combined treatment. Furthermore, the mechanical properties of the 2024 alloy are also significantly affected by the combined treatment： the tensile strength and elongation are increased by 28.3% and 92.3% （maximum increase）, respectively, compared with those without any treatment. However, the yield strength is slightly affected by the degassing treatment （with an increase of only 6.7%, maximum increase）. In addition, with the degassing treatment, the fracture mode is transformed from brittle fracture to microvoid coalescence fracture, improving the mechanical properties of the alloy.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第6期1427-1431,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51074207
50974037)
国家"十二五"科技支撑计划课题(2011BAE22B03)
国家"十二五"科技支撑计划子课题(2012BAF09B01)
国家"973"计划课题(2013CB632203)
东北大学博士研究生科研创新项目(N100609002)
中国博士后科学基金资助项目(20100471468)
关键词
超声除气
C2Cl6除气剂
铝合金
氢含量
力学性能
ultrasonic degassing
C2Cl6 degasser
aluminum alloy
hydrogen content
mechanical properties
