Y含量对机械振动ZL114A合金组织及力学性能的影响
Effects of Y Content on Microstructure and Mechanical Properties of Mechanical Vibration ZL114A Alloy
朱劲松 1芦刚 1陈晓 1廖青春 1廖倚 1陈义斯1
作者信息
- 1. 南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌 330063
- 折叠
摘要
为了改善ZL114A的力学性能,采用稀土Y对机械振动下ZL114A合金进行变质处理,研究Y含量对其微观组织及力学性能的影响.结果表明,稀土Y能有效细化α-Al枝晶并促进α-Al枝晶由粗大的树枝状向蔷薇状转变,同时使共晶Si呈短棒状且均匀分布.随着Y含量增加,合金的抗拉强度、伸长率及硬度均呈先增后减的趋势.当Y含量为 0.6%时,合金的二次枝晶间距最小,为20.4 μm,其抗拉强度、伸长率及硬度(HV)值最大,分别为370.92 MPa、6.8%和91.08.当Y含量大于0.6%时,α-Al组织逐渐粗化,稀土相由较小的块状转变为长棒状.
Abstract
In order to improve the mechanical properties of ZL114A,the rare earth Y was added to modify ZL114A alloy under the mechanical vibration,and the influence of Y on microstructure and mechanical properties was investi-gated.The results indicate that rare earth Y can effectively refine α-Al dendrites and promote the transformation of α-Al dendrites from coarse dendritic to rose-like.Moreover,the eutectic silicon exhibits short rods and uniform distri-bution.With the increase of Y content,the tensile strength,elongation,and hardness of alloy presents a trend of increasing firstly and then decreasing.The secondary dendrite spacing of alloy reaches the minimum of 20.4 μm with 0.6%Y,and the tensile strength,elongation,and hardness values reach the maximum,which are 370.92 MPa,6.8%,and 91.08 HV,respectively.When Y content exceeds 0.6%,α-Al is gradually coarsed,and the rare earth phase is converted from small blocks to long rods.
关键词
ZL114A合金/稀土Y/机械振动/微观组织/力学性能Key words
ZL114A Alloy/Rare Earth Y/Mechanical Vibration/Microstructure/Mechanical Properties引用本文复制引用
基金项目
国家自然科学基金资助项目(52265051)
出版年
2024
NETL
NSTL
万方数据