单晶空心叶片榫头再结晶行为研究（英文）  

Recrystallization Behavior of Single-crystal Hollow Blade Tenon

作　　者：梁向锋[1] 赵玉涛[1] 贾志宏[1] 徐维台[1] 张力[1] Liang Xiangfeng;Zhao Yutao;Jia Zhihong;Xu Weitai;Zhang Li(Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学,江苏镇江212013

出　　处：《稀有金属材料与工程》2018年第11期3309-3315,共7页Rare Metal Materials and Engineering

基　　金：Jiangsu Industrial Support Project(BE2014007-2,BE2014007-3,BE2014007-4);Jiangsu Development and Reform Commission([2013]2027)

摘　　要：为了更好的研究温度和载荷对镍基单晶空心叶片榫头位置的再结晶行为的影响,首先对单晶试样施加不同载荷,然后在不同的温度下进行固溶处理,采用光学显微镜和扫描电子显微镜对处理后的试样进行组织分析。结果表明:不同载荷下的DD5单晶试样经1230℃保温4h空冷后,随着载荷增加,受载荷影响区域深度增加,该区域枝晶间空间增大,未溶解的共晶组织周围弥散分布大量与γ相共格的γ′相颗粒物,γ′相粒子以胞状形式重新析出,尺寸和深度随载荷的增大而增加;经1315℃保温4 h空冷后发生再结晶现象,随着载荷增加再结晶区域增大,受载荷影响区域的枝晶干发生钝化,枝晶干与枝晶间界限消失,再结晶晶粒间存在γ/γ′共晶组织。In order to better understand the effect of the temperature and load on recrystallization behavior of DD5 single-crystal hollow blade tenon,samples with different loads were heat treated at different solution temperatures in a furnace.Optical microscope and scanning electron microscope were used to study the microstructure of recrystallization and size distribution of γ' phase after solution treatment.Results show that there are no new grains found after solution treatment at 1230℃/4h,air cooling. However,the depth of load affected area increases with the bearing load and the size and depth of recrystallized cellular structure with newly-formed γ'phase particles increase with the load below the solution temperature.Besides,the recrystallized nuclei begin from the dendrite when the solution treatment is 1315℃/4h,air cooling.The dendrite arms are passivated and the boundary between dendrite arm and interdendritic space disappear and γ/γ'phase eutectic structure exists between dendrites in the recrystallization area.Moreover,the recrystallization area and the primary dendritic size gradually increase with the increase in load above the solution temperature.

关 键 词：单晶 再结晶 γ’相 枝晶干 枝晶间 固溶处理 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程] TG132.3[一般工业技术—材料科学与工程]