熔炼路线制备Ni5W合金基带立方织构形成过程的研究  

Formation of Cube Texture in Ni5W Alloy Substrates by Melting Route

作　　者：王营霞[1] 索红莉[1] 马麟[1] 田辉[1] 袁冬梅[1] 王金华[1] 

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》2013年第8期1611-1616,共6页Rare Metal Materials and Engineering

基　　金：国家"863"重点项目(2009AA032401);国家"863"基金(2007AA03Z242);国家自然科学基金(50771003);北京自然科学基金(2092006)

摘　　要：制备具有高强度、低磁性的双轴织构金属基带是获得高性能涂层超导体的基础。目前,传统的Ni5at%W(Ni5W)合金基带已经可以工业化生产,但其立方织构的形成机理尚不明确。以真空熔炼方法制备的大形变量(约99%)冷轧Ni5W合金基带作为研究对象,采用EBSD技术进行表征,系统的研究了其形变织构的演变、再结晶形核和晶粒长大等过程。研究发现,Ni5W合金基带的形变织构为典型的铜型轧制织构;在再结晶初期阶段,立方取向晶粒优先在靠近基带表层的区域形核,且具有一定的尺寸优势,其形核在厚度方向上表现出梯度分布的特点;在完全再结晶阶段,立方取向的晶粒通过"尺寸优势"和"取向长大优势"逐渐吞并其它取向的晶粒,形成强的立方织构。One of the main challenges for coated conductor applications is to produce sharp cubic textured alloy substrates with high strength and low magnetism. At present, the traditional industrialization Ni5at%W （Ni5W） alloy substrates have been large into production However, the formation mechanism of recrystallization texture is still not investigated definitely. In this work, the cube textured Ni5W substrates with -99% cold-rolling, starting from advanced smelting casting ingots followed by Rolling Assisted Biaxial Textured Substrate （RABiTS）, have been prepared. The evolution of deformation and recrystallization textures in the Ni5W tape has been investigated by Electron Back Scattering Diffraction （EBSD）. Results show that the cold-rolled texture is a global scale. Due to the nucleation advantage, cube gains are easily produced on the surface typical of the Cu-type deformation texture on a Ni5W tapes at the early stages of recrystallization and there is a nucleation gradient along the thickness of the tapes. The formation of cube texture in Ni5W alloy appears primarily during the size advantage and preferential growth of cube grains has been discussed

关 键 词：Ni5W合金基带 再结晶织构 形核 长大 

分 类 号：TM26[一般工业技术—材料科学与工程]