Effect of processing variables on cube texture formation in powder metallurgically prepared Ni and Ni–W alloy tapes for use as substrates for coated conductor applications
Effect of processing variables on cube texture formation in powder metallurgically prepared Ni and Ni–W alloy tapes for use as substrates for coated conductor applications
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DOI：
10.1016/j.msea.2007.02.087
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发表时间：
2007-06
期刊：
影响因子：
6.4
通讯作者：
P. P. Bhattacharjee-P.;R. Ray
中科院分区：
文献类型：
--
作者：
P. P. Bhattacharjee-P.;R. Ray
本文研究了粉末冶金制备的纯Ni和Ni-5AT.%W合金在大冷轧(∼减厚95%)和退火后织构的发展。两种材料的冷轧织构无明显差异。而Ni-5AT.%W合金经退火后，立方织构更加明显，这表明W在提高Ni中立方体积分数方面起到了有利的作用。W通过降低轧制方向(RD)旋转立方颗粒的体积分数来增加立方成分的体积分数。部分再结晶研究清楚地表明，与纯Ni不同，Ni-5AT.%W合金在再结晶开始时就形成了锐利的立方取向晶粒。采用优化的两步轧制工艺(TSR)，在1350℃下进行热处理，在Ni-5at.%W合金中获得了接近100%的立方织构。
Development of textures have been studied in powder metallurgically prepared pure Ni and Ni–5at.% W alloy after heavy cold rolling (∼95% reduction in thickness) and annealing for use as substrates for coated superconductor applications. The cold rolling textures of the two materials do not show any significant difference. However, Ni–5at.% W alloy is found to develop a much sharper cube texture after annealing which indicate the beneficial role of W in increasing the cube volume fraction in Ni. W increases the volume fraction of the cube component by decreasing the volume fraction of the rolling direction (RD)-rotated cube grains. Partial recrystallization studies clearly indicate that in contrast to pure Ni sharp cube oriented grains form in Ni–5at.% W alloy right from the beginning of recrystallization. A near 100% cube texture is obtained in Ni–5at.% W alloy by an optimized two stage rolling (TSR) procedure followed by annealing at 1350°C.