Journal article
Quasi-static Tensile and Compressive Behavior of Nanocrystalline Tantalum Based on Miniature Specimen Testing-Part II: Mechanical Properties
JOM (1989), v 68(11), pp 2839-2846
01 Nov 2016
Abstract
In Part I of this work (this issue), we presented the microstructure of tantalum processed by high-pressure torsion (HPT). In this part, we will present results based on site-specific micro-mechanical testing. The experimental techniques were used due to the intrinsic microstructure gradient associated with HPT processing. The primary objective is to explore the grain size effect on the quasi-static mechanical properties of HPT processed tantalum with ultrafine grained (UFG, grain size d < 1000 nm and d > 100 nm) and nanocrystalline (NC, d < 100 nm) microstructure. Two distinct deformation modes are observed, i.e. a homogeneous (non-shearing) region and a localized (shear banding) region. Transmission electron microscopy (TEM) and orientation imaging microscopy (OIM) show that the shear bands form by grain rotation. Comparing d in these two regions to the mechanism proposed in the literature shows that reduced d in the shear banding region is more susceptible to localized shearing via grain rotation. This work unifies, or at least further substantiates, the notion that body-centered cubic metals with UFG/NC microstructure tend to have localized shear band even under quasi-static uniaxial compression.
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Details
- Title
- Quasi-static Tensile and Compressive Behavior of Nanocrystalline Tantalum Based on Miniature Specimen Testing-Part II: Mechanical Properties
- Creators
- J. Ligda - University of North Carolina at CharlotteD. Scotto D'Antuono - Drexel Univ, Dept Mat Sci, Philadelphia, PA 19104 USAM. L. Taheri - Drexel UniversityB. E. Schuster - DEVCOM Army Research LaboratoryQ. Wei - University of North Carolina at CharlotteArgonne National Lab. (ANL), Argonne, IL (United States)
- Publication Details
- JOM (1989), v 68(11), pp 2839-2846
- Publisher
- Springer Nature
- Number of pages
- 8
- Grant note
- N000141210505 / Office of Naval Research DE-AC02-06CH11357 / U.S. DOE; United States Department of Energy (DOE) W911QX-06-C-0124; W911QX-08-C-0073 / US Army Research Laboratory; United States Department of Defense; US Army Research Laboratory (ARL) DE-SC0008274 / United States Department of Energy Basic Energy Sciences (DOE/BES) under the Early Career program; United States Department of Energy (DOE) NE0000315 / Department of Energy's Nuclear Energy University Program
- Resource Type
- Journal article
- Language
- English
- Web of Science ID
- WOS:000388816100020
- Scopus ID
- 2-s2.0-84987608708
- Other Identifier
- 991019335237604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering
- Mineralogy
- Mining & Mineral Processing