Results 41 to 50 of about 15,501 (158)

Investigation of the mechanism of the indentation size effect for titanium

Mechanical Engineering Journal, 2019
In this study, we investigated the mechanism of the indentation size effect for Ti, whose crystal structure is hexagonal close-packed. Indentation tests were performed for two types of single-crystal Ti with different crystal orientations: (0001) and ...
Shota HASUNUMA, Hirohisa MIYAZAKI, Takeshi OGAWA   +2 more
doaj   +1 more source

Modeling of indentation and slip of wedge punch

Инженерно-строительный журнал, 2017
To determine the load-carrying capacity of the drillpipe slip, it is necessary to calculate the drag force on the surface between the pipe and the slip. To improve such capacity, the grip surface is provided with teeth that can indent into the pipe body.
Artem Semenov, Sergey Semenov, Boris Melnikov, Vadim Tikhonov   +3 more
doaj   +1 more source

A dual indentation method for evaluating intrinsic material properties of metals under residual stress

Journal of Materials Research and Technology
A dual flat-spherical indentation (DFSI) method is proposed for evaluating elastic-plastic properties of metallic materials under equi-biaxial residual stress (RS) state.
Jaemu Lee, Karuppasamy Pandian Marimuthu, Giyeol Han, Hyungyil Lee   +3 more
doaj   +1 more source

Effects of Crystal Orientation on the Crack Propagation of Sapphire by Sequential Indentation Testing

Crystals, 2017
Single-crystal sapphire (α-Al2O3) is a hard and brittle material. Due to its highly crystalline nature, the fracture behavior of sapphire is strongly related to its crystal structure, and understanding the effects of crystal structure on the crack ...
Ningchang Wang, Feng Jiang, Xipeng Xu, Xizhao Lu   +3 more
doaj   +1 more source

Method to determine the optimal constitutive model from spherical indentation tests

Results in Physics, 2018
The limitation of current indentation theories was investigated and a method to determine the optimal constitutive model through spherical indentation tests was proposed.
Tairui Zhang, Shang Wang, Weiqiang Wang
doaj   +1 more source

Evaluation of Non-Equibiaxial Residual Stresses in Metallic Materials via Instrumented Spherical Indentation

Metals, 2020
Residual stresses, existed in engineering structures, could significantly influence the mechanical properties of structures. Accurate and non-destructive evaluation of the non-equibiaxial residual stresses in these structures is of great value for ...
Guangjian Peng, Fenglei Xu, Jianfeng Chen, Huadong Wang, Jiangjiang Hu, Taihua Zhang   +5 more
doaj   +1 more source

Effects of Buoyancy and Surface Roughness on Mechanical Characterization of Shipbuilding Steel by Immersion Instrumented Indentation

Micromachines
To develop the applications of nanoindentation in a liquid environment, a higher requirement has been presented for evaluating measured errors of micromechanical performance, particularly for the immersion indentation.
Xiaoyuan Zhang, Zhongyu Zhao, Zhaoxin Wang, Shuai Li, Chao Sun, Yan Xia, Zhanqiang Liu, Yukui Cai, Bing Wang, Shunbo Wang   +9 more
doaj   +1 more source

Effect of Heavy Ion Irradiation Dosage on the Hardness of SA508-IV Reactor Pressure Vessel Steel

Metals, 2017
Specimens of the SA508-IV reactor pressure vessel (RPV) steel, containing 3.26 wt. % Ni and just 0.041 wt. % Cu, were irradiated at 290 °C to different displacement per atom (dpa) with 3.5 MeV Fe ions (Fe2+).
Xue Bai, Sujun Wu, Peter K. Liaw, Lin Shao, Jonathan Gigax   +4 more
doaj   +1 more source

Effects of Sample and Indenter Configurations of Nanoindentation Experiment on the Mechanical Behavior and Properties of Ductile Materials

Metals, 2018
The nanoindentation test is frequently used as an alternate method to obtain the mechanical properties of ductile materials. However, due to the lack of information about the effects of the sample and indenter physical configurations, the accuracy of the
Seyed Saeid Rahimian Koloor, Atefeh Karimzadeh, Mohd Nasir Tamin, Mohd Hamdi Abd Shukor   +3 more
doaj   +1 more source

Nanoindentation Properties of 18CrNiMo7-6 Steel after Carburizing and Quenching Determined by Continuous Stiffness Measurement Method

Metals, 2020
In this work, the nanomechanical properties involving the indentation size effect (ISE) and yield strength of a surface-modified layer of 18CrNiMo7-6 steel after case hardening were investigated via nanoindentation experiments.
Guiyuan Zhou, Jian Guo, Junyu Zhao, Qian Tang, Zhaonan Hu   +4 more
doaj   +1 more source