【摘要】 Ag元素能够使Ni和Ni-5at.%W合金基带中的晶粒形貌呈细长状,从而提升超导层电流的传输能力.研究了Ag在高W含量的NiW合金基带(>5at.%W)中对织构的影响机制,为后续调控晶粒形貌打下基础.研究表明:Ag使基带中S取向的体积分数降低,进而影响了再结晶后基带中立方晶体型织构的形成.通过在轧制变形量为90%时引入550℃保温2 h的中间热处理,可以使冷轧基带的形变因子R由0.72提升至1.05,从而增加铜型织构的体积分数,并使得基带中形变后的立方晶体的取向增大65%.最终,经过再结晶热处理获得了表面立方晶体型织构的体积分数为96.8%的Ni-7at.%W-0.01at.%Ag合金基带.更多还原

【Abstract】 The Ag element can make grains in the substrates of Ni and Ni-5 at.%W alloy elongated so as to improve the current transmission ability of superconducting layer. The mechanism of Ag effect on texture of NiW substrates with high W content(>5 at.%W) may be the basis for subsequent control of grain structure morphology. The results show that the presence of Ag decreases volume fraction of S-orientation in substrate, which further affects the formation of cubic crystal texture in the baseband after recrystallization. By introducing intermediate heat treatment at 550 ℃ for 2 h as the rolling deformation reaches about 90%, the deformation factor R of cold rolled baseband can be increased from 0.72 to 1.05, thus increasing the volume fraction of copper texture and increasing the orientation of deformed cubic crystals in the baseband by 65%. Finally, the alloy baseband with a volume fraction of 96.8% Ni-7 at.%W-0.01 at.%Ag with cubic crystal texture on the surface can be obtained after recrystallization in the heat treatment.更多还原