Statistical Approach for Understanding the Effect of Specimen Size on the Yield Stress and Its Scattering in Mechanically-Alloyed Cu and ODS-Cu Obtained by Micro-Pillar Compression Test
Statistical Approach for Understanding the Effect of Specimen Size on the Yield Stress and Its Scattering in Mechanically-Alloyed Cu and ODS-Cu Obtained by Micro-Pillar Compression Test
复制标题
DOI：
10.2320/matertrans.mt-mbw2019005
复制
发表时间：
2020-05
影响因子：
1.2
通讯作者：
Yuchen Liu;S. Kondo;Hao Yu;K. Yabuuchi;R. Kasada
中科院分区：
文献类型：
--
作者：
Yuchen Liu;S. Kondo;Hao Yu;K. Yabuuchi;R. Kasada
氧化物弥散强化铜（ODS-Cu）合金具有高强度、高导热性和上级的抗辐照性能，是聚变堆偏滤器部件所需要的材料。本研究利用微柱压缩实验，研究了机械合金化和热压制备的Cu和ODS-Cu的屈服应力与试样尺寸的关系。不同尺寸（1、3和5μm）的立方微柱的屈服应力分布不同，这是由于基体中晶粒和氧化物颗粒的空间分布不均匀造成的。[doi：10.2320/材料trans. MT-MBW 2019005]
Oxide Dispersion Strengthening copper (ODS-Cu) alloy has high strength, high thermal conductivity and superior irradiation resistance which are needed for fusion reactor divertor components. In this study, specimen size dependence of the yield stress in Cu and ODS-Cu which were made by mechanical alloying and hot pressing was investigated by micro-pillar compression test. The distributions of yield stress values were different between the sizes, 1, 3 and 5μm cubic micro-pillars, which can be explained by the inhomogeneous spatial distributions of both the crystallographic grain in matrix and oxide-particles. [doi:10.2320/matertrans.MT-MBW2019005]