Results 291 to 300 of about 623,573 (324)

Crack evolution in diamond-like carbon films on steel substrates during nano-indentation

Diamond and related materials, 2020
Fracture behaviors of thin hard diamond-like carbon (DLC) films were investigated considering the effects of plastic deformation of steel substrates. Nano-indentation tests for DLC films on SUS304 and M50 steels were conducted.
Kun Shu, Chuanwei Zhang, Pingping Hou, Zheng Dezhi, L. Gu, Liqin Wang   +5 more
semanticscholar   +1 more source

Effect of annealing on microstructure, texture and hardness of ITER-specification tungsten analyzed by EBSD, vickers micro-hardness and nano-indentation techniques

Journal of Nuclear Materials, 2019
Tungsten and its alloys have been extensively studied to be used as materials for plasma facing components (PFCs) in future nuclear fusion reactors. Under fusion operating conditions, the surface of PFCs will experience high heat flux exposure which will
L. Tanure, A. Bakaeva, A. Dubinko, D. Terentyev, K. Verbeken   +4 more
semanticscholar   +1 more source

Nano-indentation in FCC metals: experimental study

Acta Mechanica, 2009
This paper presents the results of an experimental study for nano-indentation size effects for different face centered cubic metals with different purities. The selected materials are: Silver, Copper, Aluminum, Lead, and Nickel. Nano-indentation tests are run using a Berkovich indenter with continuous stiffness measurement procedure where hardness is ...
Amin H. Almasri, George Z. Voyiadjis
openaire   +1 more source

Nano-scale mechanical properties investigation of C-S-H from hydrated tri-calcium silicate by nano-indentation and molecular dynamics simulation

Construction and Building Materials, 2018
Calcium silicate hydrate (C-S-H) is the most important hydration product in cementitious material. Due to its complexity, the investigation on its mechanical properties is still in progress.
D. Hou, Haibin Li, Lina Zhang, Jinrui Zhang   +3 more
semanticscholar   +1 more source

Comparison of nano-indentation hardness to microhardness

Surface and Coatings Technology, 2005
Abstract With a nano-indenter and a microhardness testing machine, nano-indentation hardness and microhardness are measured in a wide load range (0.1–19600 mN) for five materials. Even fused silica and silicon almost have constant hardness during the load range, the nano-indentation hardness of copper, stainless steel and nickel titanium alloy shows ...
Linmao Qian, Ming Li, Zhongrong Zhou, Hui Yang, Xinyu Shi   +4 more
openaire   +1 more source

Molecular deformation mechanism of polycarbonate during nano-indentation: Molecular dynamics simulation and experimentation

Polymer, 2019
Atomic force microscopy (AFM) enables us to evaluate the physical properties of the surface of materials on a nanoscale. Using a coarse-grained molecular dynamics (CG-MD) simulation, this study investigated the molecular deformation mechanisms of ...
Daiki Ikeshima, K. Miyamoto, A. Yonezu
semanticscholar   +1 more source

Tungsten (111) crystal strain hardening in nano-indentations

International Journal of Refractory Metals and Hard Materials, 2020
Abstract Plastic stress-strain calculations are presented for a substantial range in load versus displacement measurements made with rounded tips of Berkovich nano-indentations on tungsten (111) crystal surfaces. The computed hardness stresses are shown to be comparable to hardness measurements obtained on [111]-axis micro-whiskers; and, the ...
R.W. Armstrong, W.L. Elban
openaire   +1 more source

Nano-Indentation Characterisation of Natural Carious White Spot Lesions

Caries Research, 2010
The aim of this paper was to characterise the mechanical properties (MPs) and microstructural features of natural enamel white spot lesions (WSLs) using nano-indentation. Five natural WSLs from 4 extracted sound premolar teeth were cross-sectioned. Elastic modulus and hardness were measured systematically across the WSLs at intervals of 25 and 50 µm ...
T T Y, Huang, L H, He, M A, Darendeliler, M V, Swain   +3 more
openaire   +2 more sources

Nano-Indentation for Evaluating Low-K Dielectric Adhesion

International Symposium for Testing and Failure Analysis, 2020
Abstract Low-K dielectric adhesion problems were observed at M1 and M2 levels during thermal cycling of a flip chip product. Nano-indentation of simple BEOL test structures was used to determine the relative strength of the various interfaces in the BEOL stack.
Jeff Gambino, Tim Nitschke, Carrie Taylor, Will Barth, Harold Anderson, Wentao Qin, Robert Watkins   +6 more
openaire   +1 more source

Nano-indentation behavior of layered ultra-fine grained AA8006 aluminum alloy and AA8006-B4C nanostructured nanocomposite produced by accumulative fold forging process

Materials Science & Engineering: A, 2019
In this article, a new severe plastic deformation (SPD) process called accumulative fold-forging (AFF) was implemented to produce layered ultra-fine grained (UFG) AA8006 aluminum alloy and AA8006-B4C (35 nm, 10 vol%) nanostructured (NS) nanocomposite ...
F. Khodabakhshi, A. Gerlich, D. Verma, M. Haghshenas   +3 more
semanticscholar   +1 more source