Y对C611铝合金凝固组织及性能的影响
Effect of Y on Solidification Structure and Mechanical Properties of C611 Alloy
娄鑫宇 1孟令刚 2史淑艳 1王荫洋 3亚斌 2周秉文 2王军 3宋运坤 3张兴国2
作者信息
- 1. 大连理工大学材料科学与工程学院,辽宁大连 116024
- 2. 大连理工大学材料科学与工程学院,辽宁大连 116024;大连理工大学宁波研究院,浙江宁波 315000
- 3. 中国兵器科学研究院宁波分院,浙江宁波 315048
- 折叠
摘要
研究了添加Y元素对C611铝合金凝固组织和力学性能的影响.结果表明,随着Y含量的增加,C611合金中的α-Al组织的二次枝晶间距和共晶Si逐渐细化、变质,割裂基体的针状Al4(Fe,Mn)Si2相尺寸逐步减小.当Y含量为0.10%时,Al4(Fe,Mn)Si2相的平均长度由48.65 μm减小到28.20 μm,部分Fe以颗粒状Al15(Fe,Mn)4Si2相形式析出弥散分布在共晶硅当中,对基体起到了一定的强化作用;此时铝合金的抗拉强度和伸长率为166 MPa和6.2%,较未添加Y的基体合金分别提升了7.1%和29.2%.
Abstract
In this paper,the effect of Y addition on the solidification structure and mechanical properties of C611 aluminum alloy was studied.The results showed that with the increase of Y content,the secondary dendrite arm spacing and eutectic Si of α-Al structure in C611 alloy were gradually refined and modified,and the size of needle-like Al4(Fe,Mn)Si2 phase separated from the matrix was gradually reduced.When the Y content was 0.10%,the average length of Al4(Fe,Mn)Si2 phase decreases from 48.65 μm to 28.20 μm,and some Fe was precipitated in the form of granular Al15(Fe,Mn)4Si2 phase and dispersed in the eutectic silicon,which played a certain role in strengthening the matrix.At this time,the tensile strength and elongation of the aluminum alloy were 166 MPa and 6.2%,which were 7.1%and 29.2%higher than those of the matrix alloy without Y addition.
关键词
C611铝合金/稀土元素Y/凝固组织/抗拉强度Key words
C611 aluminum alloy/rare earth element Y/solidification structure/tensile strength引用本文复制引用
基金项目
国家重点研发计划资助项目(2018YFA0702900)
中央高校基本科研业务费(DUT22QN243)
科技创新2025重大专项:宁波市重大科技任务攻关项目(2022Z046)
出版年
2024
国家科技期刊平台
NSTL
万方数据