Electrical conductivity characterized at varying strains in spiral cut high-pressure torsion discs
Electrical conductivity characterized at varying strains in spiral cut high-pressure torsion discs
复制标题
螺旋切割高压扭盘中不同应变下的电导率特征
DOI：
10.1016/j.matlet.2022.131770
复制
发表时间：
2022
影响因子：
3
通讯作者：
Mathaudhu Suveen
中科院分区：
文献类型：
--
作者：
Ramos Evander;Masuda Takahiro;Horita Zenji;Mathaudhu Suveen
高压扭转（HPT）使加工圆盘的应变不均匀，中心应变低，外缘应变高。显微镜和显微硬度压痕已被用来表征这种不均匀性，并将其与应变联系起来，但与其他性质类似的探索并不常见。在这项工作中，通过将纯铜盘切割成螺旋形，并随应变的增量单调增加，用HPT加工的纯铜盘的电导率与等效应变有关。电导率随应变而变化，这与文献和基于晶界演化的期望一致。本文所概述的螺旋电导率测试方法可以在未来的研究中改善HPT材料的表征。
High-pressure torsion (HPT) imparts inhomogeneous strain to process discs with low strain in the center and higher strain at the outer edge. Microscopy and microhardness indentation have been used to characterize and correlate this inhomogeneity with strain, but similar exploration with other properties has been uncommon. In this work, the electrical conductivity of pure copper discs processed by HPT was characterized with respect to equivalent strain by cutting them into spirals with an incremental, monotonic increase in strain. Electrical conductivity varied with straining in agreement with the literature and expectations based on grain boundary evolution. The spiral conductivity testing method outlined in this work can improve characterization of HPT materials in future studies.