Results 21 to 30 of about 36,063 (292)

Depth-sensing indentation tests in studying plastic instabilities [PDF]

open access: yes, 2004
This review surveys the phenomenon of plastic instabilities occurring in depth-sensing indentation measurements. Investigations presented focus on the characterization of Portevin-Le Chatelier type instabilities observed in different metal alloys during ...
Bobji   +14 more
core   +1 more source

Effect of Solution Treatment and Aging Treatment on Mechanical Properties of 2060 Al-Li Alloy and Process Multi-Objective Optimization

open access: yesMetals, 2022
Solution and aging heat treatment are effective means to improve the mechanical properties of Al-Li alloys. The solution treatment and aging treatment tests of 2060 Al-Li alloy were carried out.
Jing Zhou   +3 more
doaj   +1 more source

Influence of the final temperature of investment healting on the tensile strength and Vickers hardness of CP Ti and Ti-6Al-4V alloy

open access: yesJournal of Applied Oral Science, 2007
The aim of the work was to evaluate the influence of the temperature of investment healting on the tensile strength and Vickers hardness of CP Ti and Ti-6Al-4V alloy casting. Were obtained for the tensile strength test dumbbell rods that were invested in
Pedro César Garcia Oliveira   +5 more
doaj   +1 more source

Mechanical behavior analysis of a Friction Stir Welding (FSW) for welded joint applied to polymer materials [PDF]

open access: yesFracture and Structural Integrity, 2019
Welding is a technique of fusion joining the material involving a process of inter-molecular diffusion adhesion. Polymer welding is an assembly method among several known assembly techniques such as gluing. This welding process applies to thermoplastics;
Hachellaf Kaddour   +3 more
doaj   +1 more source

Influence of firing temperature and duration on the hardness of dental zirconia for optimum selection of sintering conditions

open access: yesJournal of Applied Biomaterials & Functional Materials, 2022
Objective: In order to optimize the properties of dental zirconia, the sintering process involves firing zirconia to elevated temperatures for an extended time that can take several hours.
Omar Al-Surkhi, Zeina Hamad
doaj   +1 more source

Properties of nanocellulose and zirconia alumina on polymethylmethacrylate dental composite

open access: yesDental Journal, 2023
Background: Polymethylmethacrylate (PMMA) is one of the synthetic polymers generally used for temporary jacket crown restorations because of its good translucency, making its aesthetic value higher, but its mechanical properties, such as hardness and ...
Eva Febrina   +3 more
doaj   +1 more source

Thermal-Mechanical Properties of Polyurethane-Clay Shape Memory Polymer Nanocomposites [PDF]

open access: yes, 2010
Shape memory nanocomposites of polyurethane (PU)-clay were fabricated by melt mixing of PU and nano-clay. Based on nano-indentation and microhardness tests, the strength of the nanocomposites increased dramatically as a function of clay content, which is
Chen, Zhen Guo,   +7 more
core   +5 more sources

The Measurement of Surface Hardness of Mineral Trioxide Aggregate Material (MTA) using Two Techniques of Condensation. [PDF]

open access: yesAl-Rafidain Dental Journal, 2008
Aims: This in vitro study was conducted to exam the effect of condensation technique on surface hardness of MTA. Materials and Methods: In this study, 20 acrylic blocks were used.
Maha A. AlMurad
doaj   +1 more source

The effect of quenching and defects size on the HCF behaviour of Boron steel [PDF]

open access: yes, 2014
This work investigates the effect of natural and artificial surface defects and quenching on the fatigue strength of a Boron steel (22MnB5). A vast experimental campaign has been undertaken to study the high cycle fatigue behaviour and more specifically ...
ABRIVARD, Benjamin   +4 more
core   +6 more sources

Surface Roughness Effect on Microhardness Measurements

open access: yesTribology in Industry
Micro-Vickers hardness measurements are essential for evaluating micro-scale material hardness, providing insights into surface properties and material strength. However, many factors can influence the precision of hardness measurements.
Raimonds Sirants, Janis Lungevics
doaj   +1 more source

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