High throughput exploration of process-property linkages in Al-6061 using instrumented spherical microindentation and microstructurally graded samples

被引：58
作者：
Weaver J.S. [1 ,2 ]
Khosravani A. [1 ]
Castillo A. [1 ]
Kalidindi S.R. [1 ]
机构：
[1] George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA
[2] Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM
来源：
Integrating Materials and Manufacturing Innovation | 2016年 / 5卷 / 01期
关键词：
Aging; Al alloys; Hertzian indentation; High throughput; Sample libraries;
D O I：
10.1186/s40192-016-0054-3
中图分类号：
学科分类号：
摘要：
Recent spherical nanoindentation protocols have proven robust at capturing the local elastic-plastic response of polycrystalline metal samples at length scales much smaller than the grain size. In this work, we extend these protocols to length scales that include multiple grains to recover microindentation stress-strain curves. These new protocols are first established in this paper and then demonstrated for Al-6061 by comparing the measured indentation stress-strain curves with the corresponding measurements from uniaxial tension tests. More specifically, the scaling factors between the uniaxial yield strength and the indentation yield strength was determined to be about 1.9, which is significantly lower than the value of 2.8 used commonly in literature. The reasons for this difference are discussed. Second, the benefits of these new protocols in facilitating high throughput exploration of process-property relationships are demonstrated through a simple case study. © 2016, The Author(s).
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页码：192 / 211
页数：19
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