Effects of processing on texture, internal stresses and mechanical properties during the pulsed electrodeposition of nanocrystalline and ultrafine-grained nickel
Effects of processing on texture, internal stresses and mechanical properties during the pulsed electrodeposition of nanocrystalline and ultrafine-grained nickel
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DOI：
10.1016/j.actamat.2013.03.008
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发表时间：
2013-06
期刊：
影响因子：
9.4
通讯作者：
Kerstin Schüler;B. Philippi;M. Weinmann;V. Marx;H. Vehoff
中科院分区：
文献类型：
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作者：
Kerstin Schüler;B. Philippi;M. Weinmann;V. Marx;H. Vehoff
纳米晶和超细晶金属的力学性能强烈地依赖于晶粒度、晶界偏析、织构和内应力。本文系统地分析了不同脉冲电沉积工艺参数和细化剂对镍的晶粒度、织构、偏析及内应力的影响。系统地改变了电解液中细化剂的含量，主要是糖精的含量，脉冲通断时间和脉冲电流密度等参数。结合不同的压力和质地分析方法，除其他外，可以仔细讨论糖精对压力和质地发展的影响。在增量加载试验中，制作了不同晶粒度的大量拉伸试件，并进行了变形试验。这些试验清楚地表明了生产工艺对恒定载荷下的变形行为的强烈影响。
The mechanical properties of nanocrystalline and ultrafine-grained metals strongly depend on grain size, grain boundary segregation, texture and internal stresses. In this paper a thorough systematic analysis is given on the influence of different pulsed electrodeposition processing parameters and grain refiners on the grain size, texture and segregation of Ni and thus on internal stresses. The grain refiner content of the electrolyte, mainly the saccharin content, and the pulse parameters on- and off-time as well as the pulse current density were varied systematically. The combination of different methods of stress and texture analysis allows, among other things, a careful discussion of the influence of saccharin on stress and texture development. Massive tensile specimens were produced with different grain sizes and deformed in incremental load tests. These tests clearly demonstrate the strong effect of the production process on the deformation behavior under constant load.