نتایج جستجو برای: hardness strength
تعداد نتایج: 229077 فیلتر نتایج به سال:
Waterborne polymers, including waterborne polyurethanes (WPU), polyester dispersions (PED), and polyacrylate emulsions (PAE), are employed as environmentally friendly water-based coatings and adhesives. An efficient, fast, stable, and safe cross-linking strategy is always desirable to impart waterborne polymers with improved mechanical properties and water/solvent/thermal and abrasion resistanc...
Electron beam welding has shown a remarkable job in the space industry for welding of components. It is performed under a vacuum environment that eliminates foreign matter such as hydrogen, oxygen, and other gases. Joining of similar and dissimilar materials is the main advantage of electron beam welding with high depth to width ratio as well as sharp focus at the point where parts are to be we...
Friction Stir Welding is one of the solid-state processes and today it has been used to join different types of materials. Friction stir welding does not have many problems and limitations due to melting and solidification of weld metal and by controlling its variables, the microstructure and desired mechanical properties can be achieved at the joint. Recently, in most industrial areas, due t...
Friction Stir Welding is one of the solid-state processes and today it has been used to join different types of materials. Friction stir welding does not have many problems and limitations due to melting and solidification of weld metal and by controlling its variables, the microstructure and desired mechanical properties can be achieved at the joint. Recently, in most industrial areas, due t...
Correspondence to: Cláudia Helena Lovato da Silva Departamento de Materiais Dentários Faculdade de Odontologia de Ribeirão Preto, USP Av. do Café, S/N, 14040-904, Ribeirão Preto, SP, Brasil Tel: +55-16-3602-4006 Fax: +55-16-3633-0999. E-mail: [email protected] Abstract Aim: This study aim to investigate the effect of a denture cleanser on hardness, roughness and tensile bond strength of a rigid (...
Although in recent years, welding of polymers has been developed but welding of polycarbonates is still faced with serious challenges such as improving the quality of welded section. In the present study, mechanical properties of polycarbonate friction stir welded samples with different nano alumina content were investigated. For this purpose, firstly polycarbonate (as matrix) was melt compound...
In this research, the effect of standoff distance and explosive material thickness on metallurgical features of explosive welding connection of copper to 304 stainless steel has been investigated. Experimental analysis were performed using optical microscopy, scanning electron microscopy, microhardness test and tensile shear strength test. The results indicated that due to severe plastic deform...
Background and Aims: In this in-vitro study, the effect of multiple adhesive coating on the microshear bond strength of composite to dentin and surface microhardness of dentin after treatment with four adhesives (One Step Plus, One Step, Single Bond, Single Bond 2) were evaluated. Materials and Methods: One hundred intact human molars were cut to obtain disks of dentin having 2 mm thickness. F...
Article history: Received: 22.5.2013. Received in revised form: 16.9.2013. Accepted: 11.10.2013. Pre-quenching and pre-normalization are selected as pre-treatment processes. Microstructures, the tensile strength and hardness of zero-time-holding quenched 40Cr steel with different pre-treatment are investigated. The results show that the zerotime-holding 40Cr steel quenched by prequenching is fi...
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