轧制中间热处理温度对Ni7W/Ni12W/Ni7W复合基带组织及织构的影响（英文）  

Microstructure and Texture of Ni7W/Ni12W/Ni7W Composite Substrates at Different Intermediate Annealing Temperatures

作　　者：刘婧[1] 索红莉[1] 马麟[1] 喻丹[1] 崔瑾 纪耀堂 Liu Jing, Suo Hongli, Ma Lin, Yu Dan, Cui Jin, Ji Yaotang(Beijing University of Technology, Beijing 100124, China)

机构地区：[1]北京工业大学,北京100124

出　　处：《稀有金属材料与工程》2018年第10期2936-2941,共6页Rare Metal Materials and Engineering

摘　　要：采用压延辅助双轴织构技术制备了涂层导体用Ni7W/Ni12W/Ni7W复合基带。复合基带轧制形变过程加入3次不同温度的轧制中间热处理优化其形变组织。采用X射线衍射及背散射电子衍射技术分析了复合基带轧制过程中表面及截面的形变、回复组织,以此探索轧制中间热处理温度对Ni7W/Ni12W/Ni7W复合基带形变及立方织构形成过程的影响机制。结果显示,经600℃/60 min轧制中间热处理后的复合基带在较低的再结晶温度下获得了95%(<10°)的高立方织构。晶体取向分布图表明该中间热处理温度下复合基带回复及初始再结晶组织中立方取向的晶粒含量都更高;不同取向间点对点的晶体取向差分析证实立方取向晶粒有较大的晶界角,这使立方取向在回复及初始再结晶过程具有高的界面迁移率,从而促进了后续再结晶过程强立方织构的形成。Ni7W/Ni12W/Ni7W composite substrates for YBa2Cu3O（7-δ）coated conductors were prepared by rolling assisted biaxially textured substrates route.A threefold intermediate annealing at different temperatures was introduced in the rolling process of Ni7W/Ni12W/Ni7W composite substrates to optimize the deformation texture.The recovery microstructure and the deformation texture of latitude and longitude section were studied with X-ray diffraction and electron backscattered diffraction to reveal the possible mechanism of temperature effects on rolling and strong cube texture formation processes.The results show that the highest cube area fraction is found in sample intermediately annealed at 600°C/60 min;in this way Ni7W/Ni12W/Ni7W composite substrates with high cube texture content of 95%（10°）are obtained at a low recrystallization annealing temperature.Crystal orientation maps reveal that a higher amount of cube orientation exists in its recovery and initial recrystallization samples.Point to point misorientation files confirm the high grain boundary angle of these cube grains,which strongly boost the cube texture formation during subsequent recrystallization.

关 键 词：高温超导材料 NiW基带 轧制中间退火 形变组织 立方取向 

分 类 号：TG335[金属学及工艺—金属压力加工] TB331[一般工业技术—材料科学与工程]