Journal ArticleDOI
Characterization of deformation anisotropies in an α-Ti alloy by nanoindentation and electron microscopy
Jonghan Kwon,M. C. Brandes,P. Sudharshan Phani,A. P. Pilchak,Yanfei Gao,Yanfei Gao,Easo P. George,Easo P. George,George M. Pharr,George M. Pharr,Michael J. Mills +10 more
TLDR
In this paper, the authors measured the crystallographic dependence of the mechanical responses of an α-Ti-7-wt.% Alloy by nanoindentation using spherical and Berkovich indenters, and the dislocation structures resulting from indentation were characterized by electron microscopy.About:
This article is published in Acta Materialia.The article was published on 2013-08-01. It has received 69 citations till now. The article focuses on the topics: Slip (materials science) & Nanoindentation.read more
Citations
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Journal ArticleDOI
Mechanism and energetics of 〈c + a〉 dislocation cross-slip in hcp metals.
TL;DR: At atomistic simulations in Mg reveal the unusual mechanism of 〈c+a〉 dislocation cross-slip between pyramidal I and II planes, which occurs by cross-Slip of the individual partial dislocations.
Journal ArticleDOI
A rotational and axial motion system load frame insert for in situ high energy x-ray studies
Paul A. Shade,Basil Blank,Jay C. Schuren,T. J. Turner,Peter Kenesei,Kurt Goetze,Robert M. Suter,Joel V. Bernier,S. F. Li,Jonathan Lind,Ulrich Lienert,Jonathan Almer +11 more
TL;DR: The design and performance of a load frame insert with a rotational and axial motion system that has been developed to meet the requirements of experimental design requirements and an example dataset from a deforming titanium alloy demonstrates the new capability.
Journal ArticleDOI
Effects of sintering temperature on microstructure and mechanical properties of spark plasma sintered titanium
TL;DR: In this article, the microstructure evolution and mechanical properties of spark plasma sintered commercially pure titanium were studied, which was performed at a temperature range of 750-1350°C for a dwell time of 5min under an external pressure of 50MPa in vacuum.
Journal ArticleDOI
Strength statistics of single crystals and metallic glasses under small stressed volumes
TL;DR: In this paper, the authors show that the universal picture should be the thermally activated nucleation mechanisms in small stressed volume, the stochastic behavior as to find the weakest links in intermediate sizes of the stressed volume and the convolution of these two mechanisms with respect to variables such as indenter radius in nanoindentation pop-in, crystallographic orientation, prestrain level, sample length as in uniaxial tests, and others.
Journal ArticleDOI
A nanoindentation investigation of local strain rate sensitivity in dual-phase Ti alloys
TL;DR: In this article, the authors investigated the local strain rate sensitivity in dual-phase Ti alloys, Ti-6Al-2Sn-4Zr-xMo (x = 2 and 6), as a potential factor causing cold dwell fatigue.
References
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Book
Single Crystal Elastic Constants and Calculated Aggregate Properties. A Handbook
Gene Simmons,Herbert F. Wang +1 more
TL;DR: In this paper, the authors present data on the elastic properties of single crystals collected from the literature through mid-1970 and the elastic property of isotropic aggregates which are calculated according to the schemes of Voigt and Reuss for all materials, and Hashin and Shtrikman for materials with cubic symmetry.
Journal ArticleDOI
Deformation behavior of HCP Ti-Al alloy single crystals
TL;DR: In this article, a comparison of the critically resolved shear stress (CRSS) values for basal and prism slip as a function of Al content was performed on Ti-6.6 pct alloys.
Journal ArticleDOI
Deformation and creep modeling in polycrystalline Ti–6Al alloys
TL;DR: In this paper, an experimentally validated computational model for titanium alloys accounting for plastic anisotropy and time-dependent plasticity for analyzing creep and dwell phenomena was developed for hcp crystalline structure, with the inclusion of microstructural crystallographic orientation distribution.
Journal ArticleDOI
A different type of indentation size effect
Sang Hoon Shim,Sang Hoon Shim,Hongbin Bei,Easo P. George,Easo P. George,George M. Pharr,George M. Pharr +6 more
TL;DR: In this paper, pop-in during nanoindentation, which indicates the onset of dislocation plasticity, was systematically investigated in annealed and pre-strained single crystals of nickel using spherical indenters with different tip radii.
Journal ArticleDOI
The effect of crystal orientation on the indentation response of commercially pure titanium: experiments and simulations
TL;DR: In this paper, the authors combine nanoindentation, electron backscatter diffraction (EBSD) and crystal plasticity finite element analysis to examine the anisotropy in the indentation behavior of individual grains within an α-Ti polycrystal.
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