摘要
研究了不同输出功率（0-900 W）和作用时间（0-120s）的超声波对长周期结构增强Mg97Y2Cu1合金凝固组织和力学性能的影响。结果表明,经超声熔体处理后,合金的凝固组织及力学性能均得到了改善,其第二相由连续网络状变为均匀弥散状;随着功率或处理时间的增加,合金的初生晶粒先细化后粗化,转折点分别为700 W和60s。当功率为700 W,处理时间为60s时,合金的综合性能最好,其抗拉强度和伸长率分别为198 MPa和15.4%,较常规铸造条件分别提高了23.8%和105%。
Influences of different power（0-900 W）and treating time（0-120s）of ultrasonic on solidified structure and mechanical properties of Mg97Y2Cu1 alloy reinforced by long-period ordered structure were described.The results show that solidified structure and mechanical properties of the alloy can be improved by ultrasonic melt-treatment.The second phase is transformed from continuous network into uniform dispersion particles.With the increase of ultrasonic power or treating time,primary grain in the alloy is refined at first and then coarsened,and primary phase exhibits desirable with 700 Wfor 60 s.With the ultrasonic power of 700 Wfor 60s,tensile strength and elongation of the alloy are increased by23.8% and by 105%,respectively,compared with those of the alloy under traditional condition.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2015年第8期875-878,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51261026)
关键词
超声波
长周期结构
Mg97Y2Cu1合金
凝固组织
力学性能
Ultrasonic
Long-period Ordered Structure
Mg97Y2Cu1 Alloy
Solidified Structure
Mechani-cal Properties
