On the basis of Al-V-B grain refining agent,rare earth element La was added,and Al-5V-3B-0.5La intermediate alloy was prepared by sintering method.The size,distribution,and morphology of nucleation particles in the re...On the basis of Al-V-B grain refining agent,rare earth element La was added,and Al-5V-3B-0.5La intermediate alloy was prepared by sintering method.The size,distribution,and morphology of nucleation particles in the refining agent at different sintering temperatures and the refining effect on A356 alloy were studied.The experimental results show that with the increase of sintering temperature,the addition of La element reduces the particle size of nucleated particles in the refining agent,makes the distribution more uniform,and has a good grain refinement effect on A356 alloy,with a significant reduction in grain size to around 184.62μm.It provides reference for the development of high-quality grain refining agents.展开更多
在Gleeble-1500热模拟机上对Ti-5Al-5Mo-5V-1Cr-1Fe合金进行高温热压缩实验,研究该合金在变形温度为750~900℃、应变速率为0.001~1 s 1条件下的流变应力行为。利用光学显微镜分析合金在不同变形条件下的组织演化规律。结果表明：合金的...在Gleeble-1500热模拟机上对Ti-5Al-5Mo-5V-1Cr-1Fe合金进行高温热压缩实验,研究该合金在变形温度为750~900℃、应变速率为0.001~1 s 1条件下的流变应力行为。利用光学显微镜分析合金在不同变形条件下的组织演化规律。结果表明：合金的流变应力随着应变速率的增大和变形温度的降低而增大;流变应力随着应变的增加而增大,出现峰值后逐渐趋于平稳;变形过程中的流变应力可用Arrhenius双曲正弦本构关系来描述,平均变形激活能为454.2 kJ/mol;各种变形条件均可细化原始晶粒尺寸。随着温度的升高和应变速率的降低,合金的主要软化机制由动态回复逐渐变为动态再结晶;在（α＋β）相区变形（750~850℃）时,α相对β晶粒的动态再结晶的发生起到阻碍作用。展开更多
基金Funded by the Science and Technology Project of State Grid Shanghai Municipal Electric Power Company(No.5209A6240003)the 2024 Shanxi Provincial Major Science and Technology Special Project(No.202401050201003)。
文摘On the basis of Al-V-B grain refining agent,rare earth element La was added,and Al-5V-3B-0.5La intermediate alloy was prepared by sintering method.The size,distribution,and morphology of nucleation particles in the refining agent at different sintering temperatures and the refining effect on A356 alloy were studied.The experimental results show that with the increase of sintering temperature,the addition of La element reduces the particle size of nucleated particles in the refining agent,makes the distribution more uniform,and has a good grain refinement effect on A356 alloy,with a significant reduction in grain size to around 184.62μm.It provides reference for the development of high-quality grain refining agents.
文摘在Gleeble-1500热模拟机上对Ti-5Al-5Mo-5V-1Cr-1Fe合金进行高温热压缩实验,研究该合金在变形温度为750~900℃、应变速率为0.001~1 s 1条件下的流变应力行为。利用光学显微镜分析合金在不同变形条件下的组织演化规律。结果表明：合金的流变应力随着应变速率的增大和变形温度的降低而增大;流变应力随着应变的增加而增大,出现峰值后逐渐趋于平稳;变形过程中的流变应力可用Arrhenius双曲正弦本构关系来描述,平均变形激活能为454.2 kJ/mol;各种变形条件均可细化原始晶粒尺寸。随着温度的升高和应变速率的降低,合金的主要软化机制由动态回复逐渐变为动态再结晶;在（α＋β）相区变形（750~850℃）时,α相对β晶粒的动态再结晶的发生起到阻碍作用。
