Mechanical properties of standard samples and of small samples of D16AT alloy

1980 ◽  
Vol 16 (2) ◽  
pp. 191-194 ◽  
Author(s):  
G. G. Maksimovich ◽  
F. P. Yanchishin ◽  
V. S. Pavlina ◽  
Ya. S. Shchepanskii ◽  
S. M. Kudlak
Keyword(s):  
Mechanical Properties ◽  
Small Samples ◽  
Standard Samples ◽  
D16at Alloy

Preparation and Mechanical Properties of Polyethylene-Portland Cement Composites

2009 ◽  
Vol 1242 ◽  
Author(s):  
Rivas-Vázquez L.P. ◽  
Suárez-Orduña R. ◽  
Valera-Zaragoza M. ◽  
Máas-Díaz A. De la L. ◽  
Ramírez-Vargas E.
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Portland Cement ◽  
Plastic Waste ◽  
Cement Composites ◽  
Compression Tests ◽  
Standard Samples ◽  
Cement Ratio ◽  
Reinforcing Fibers ◽  
Waste Polyethylene

ABSTRACTThe effects of waste polyethylene aggregate as admixture agent in Portland cement at different addition polyethylene/cement ratios from 0.0156 to 0.3903 were investigated. The reinforced samples were prepared according the ASTM C 150 Standard (samples of 5 × 5 × 5 cm). The reinforcing fibers were milling at a size of 1/25 in diameter, form waste and used them to evaluate the effects in mechanical properties in cement-based composites. The evaluation of polyethylene as additive was based on results of density and compression tests. The 28-day compressive strength of cement reforced with plastic waste at a replacement polyethylene/cement ratio of 0.0468 was 23.5 MPa compared to the control concrete (7.5 MPa). The density of cement replaced with polyethylene varies from 2.114 (0% polyethylene) to 1.83 g/cm3 by the influence of polyethylene.

Improvement of Structural Characteristics for CuZn Alloy through Heat Treatments

2017 ◽  
Vol 750 ◽  
pp. 3-8
Author(s):  
Dragoş Cristian Achiţei ◽  
Petrică Vizureanu ◽  
Mirabela Georgiana Minciună ◽  
Nicanor Cimpoeşu ◽  
Bogdan Istrate
Keyword(s):  
Mechanical Properties ◽  
Optical Microscopy ◽  
Thermal Processing ◽  
Structural Characteristics ◽  
Heat Treatments ◽  
Alloying Elements ◽  
Standard Samples ◽  
Cuzn Alloy ◽  
Quenching And Tempering

The paper presents aspects of structure modifications and properties for a CuZn alloy, after the appliance of heat treatments, at their specific parameters. The samples subjected to analysis, coming from cast bar, from which have been taken standard samples, with specific dimensions for experiments.Nonferrous alloys are subject frequently to annealing, quenching and tempering. The annealing follows the homogenization of structure after casting. The quenching followed by tempering is a spectacular modality to modify the mechanical properties for numerous nonferrous alloys.The characteristics of alloys have highlighted by experiments, using standard samples specific to the requests. The determination of alloying elements was made on optical spectrometer. The researches by SEM and optical microscopy, confirm the improvement of properties by obtaining uniform structures according to the applied thermal processing.

scholarly journals Samples of concrete of small sizes

2019 ◽  
Vol 91 ◽  
pp. 02043
Author(s):  
Andrew Varlamov ◽  
Sergey Tverskoi ◽  
Vadim Gavrilov
Keyword(s):  
Reinforced Concrete ◽  
Strain State ◽  
Concrete Structures ◽  
Small Samples ◽  
Reinforced Concrete Structures ◽  
Standard Samples ◽  
Stress Strain ◽  
Strength And Deformation ◽  
Loss Of Strength ◽  
Reference Samples

The article analyzes the sizes of concrete samples. We revealed a possibility to reduce sizes of samples. We simultaneously carried out tests of standard and small (25x25x100 mm) concrete samples. Small samples were obtained by cutting standard samples. In the course of study, the density, strength, and deformation of standard and small specimens were measured. The results are presented in tables and graphs. The strength of small samples was lower than the strength of reference samples. We identified loss of strength of the samples when cutting concrete. The average characteristics of deformation of concrete remained. Small samples are recommended for use in assessing the stress-strain state of reinforced concrete structures.

scholarly journals Experimental Investigation of Mechanical Properties of PVC Polymer under Different Heating and Cooling Conditions

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Sarkawt Rostam ◽  
Alan Kareem Ali ◽  
Firdaws Haidar AbdalMuhammad
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Room Temperature ◽  
Heating Temperature ◽  
Industrial Applications ◽  
Standard Samples ◽  
Heating And Cooling ◽  
Working Environments ◽  
Cooling Conditions ◽  
Temperature Ranges

Due to a widely increasing usage of polymers in various industrial applications, there should be a continuous need in doing research investigations for better understanding of their properties. These applications require the usage of the polymer in different working environments subjecting the material to various temperature ranges. In this paper, an experimental investigation of mechanical properties of polyvinyl chloride (PVC) polymer under heating and cooling conditions is presented. For this purpose standard samples are prepared and tested in laboratory using universal material testing apparatus. The samples are tested under different conditions including the room temperature environment, cooling in a refrigerator, and heating at different heating temperatures. It is observed that the strength of the tested samples decreases with the increasing of heating temperature and accordingly the material becomes softer. Meanwhile the cooling environments give a clear increasing to the strength of the material.

Three Ways of Sampling and Fatigue Test Results of Steel P92

2014 ◽  
Vol 891-892 ◽  
pp. 273-277
Author(s):  
Josef Volák ◽  
Zbynek Bunda
Keyword(s):  
Mechanical Properties ◽  
Power Plant ◽  
Fatigue Test ◽  
Fatigue Tests ◽  
Energy Industry ◽  
Fatigue Properties ◽  
Test Results ◽  
Steam Turbines ◽  
Standard Samples ◽  
Energy Component

This paper describes the fatigue properties of the steel P92. This material is widely used in the energy industry, especially for pipes and pipe bends of supercritical steam turbines. Steel P92 is alloyed with 2 % of tungsten compared to steel P91. This increases a creep strenght of the material. It is possible to reduce wall thickness of the P92 pipe up to about 20%. Fatigue tests were carried out on standard samples and compared with SFT samples (Small Fatigue Test). Using the device SSam 2 made by company Rolce Royce, it is possible to gently remove a samples from energy component without power plant shutdowns. Consider these correlations, i tis possible to determine mechanical properties of the material from small amount of removed experimental material.

Mechanical Properties and Microstructural Characterization of Cobalt-Chromium (CoCr) Obtained by Casting and Selective Laser Melting (SLM)

2017 ◽  
Vol 899 ◽  
pp. 534-539 ◽  
Author(s):  
Marcello Vertamatti Mergulhão ◽  
Carlos Eduardo Podestá ◽  
Maurício David Martins das Neves
Keyword(s):  
Mechanical Properties ◽  
Selective Laser Melting ◽  
Rupture Strength ◽  
Chemical Properties ◽  
Optical Microscope ◽  
Tensile Yield Strength ◽  
Cobalt Chromium ◽  
Laser Melting ◽  
Standard Samples ◽  
Casting Technique

The aim of this study is the consolidation of Cobalt-Chromium (CoCr) alloy powder using the additive manufacturing - selective laser melting (SLM) and the investment casting techniques. The research of this study has been applied to their biomaterial applied to development of prosthesis and dental implants. The gas atomized powder are spherical (mean diameter equal to 42,74 μm) and was analyzed by their physical and chemical properties. The microstructure of the powder and specimens was evaluated using optical microscope (OM) and scanning electron microscope with energy-dispersed X-ray spectroscopy (SEM-EDS). The mechanical properties were evaluated of standard samples using a tensile (yield strength, maximum tensile, rupture tensile and elongation), three point bending (transverse rupture strength) and micro hardness tests. The mechanical results indicate higher values for the SLM than casting specimens. The micrographs revealed a characteristic morphology of laser been used in the SLM technique and the dendrites in the casting technique. The microstructure of samples made by SLM is thinner than the samples obtained in the cast.

APPLICATION OF ADDITIVE TECHNOLOGIES IN THE TECHNICAL SERVICE OF GARDEN EQUIPMENT

2020 ◽  
pp. 39-44
Author(s):  
ALEKSEI S. DOROKHOV ◽  
◽  
ALEKSEI S. SVIRIDOV ◽  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Physical And Mechanical Properties ◽  
Additive Technologies ◽  
3D Printer ◽  
Technical Service ◽  
Test Results ◽  
Standard Samples ◽  
Sliding Bearings ◽  
Equipment Failures

The paper considers the analysis of the market for garden equipment. The authors consider some information on garden equipment failures, using an example of Husqvarna trimmers. They also assess a possibility of using additive technologies to manufacture sliding bearings for mechanical drives of garden equipment. For testing the physical and mechanical properties, a batch of samples was prepared by means of 3D printing using FDM (FFF) technology. According to the ASTM D638-14 standard, samples were prepared on a PICASO 3D Desingner X Pro 3D printer. Samples were made of ABS-plastic and PA12 with diff erent degrees of fi lling: 20, 50 and 100%. It is noted that the destruction pattern of samples made of diff erent materials is signifi cantly diff erent. Samples made from ABS plastics are more fragile than samples made from PA12. According to the test results, PA12 with 100% fi lling have shown the best results, which makes them suitable for use in the manufacture of slide bearings by means of 3D printing.

scholarly journals Near infrared spectroscopy for assessing mechanical properties of Castanea sativa wood samples

2019 ◽  
Vol 50 (4) ◽  
pp. 191-197 ◽  
Author(s):  
Manuela Mancini ◽  
Elena Leoni ◽  
Michela Nocetti ◽  
Carlo Urbinati ◽  
Daniele Duca ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Bending Strength ◽  
Prediction Models ◽  
Castanea Sativa ◽  
Modulus Of Rupture ◽  
Current Standard ◽  
Standard Samples

Near infrared spectroscopy (NIR) is a technique widely used for the prediction of different chemical-physical features of wood. In this study, the technique was used to assess its potential to predict the mechanical characteristics of wood. Castanea sativa samples of three different European provenances were collected and laboratory tests were performed to assess the mechanical properties of wood samples. Modulus of elasticity (MOE), load-deflection curve and modulus of rupture (MOR) were calculated by using INSTRON machine with three points bending strength with elastic modulus, while density (D) was calculated according to the current standard. Samples were then analysed by means of NIR spectroscopy. The raw spectra were pre-processed and regression models were developed. Variables selection techniques were used to improve the model performance. In detail, MOE regression model returned an error of 696.01 MPa (R2=0.78). Instead, MOR and D prediction models must be further investigated on a wider number of samples considering the high variability in physical characteristics of chestnut wood. The results demonstrated the possibility to use NIR technique for the prediction of the mechanical properties of wood providing useful indications in evaluation-screening processes. Indeed, the presence of the principal wood compounds (cellulose, hemicellulose and lignin) and their influence in the characterisation of mechanical stress reactions were confirmed.

Valuation of Mechanical Properties and Microstructural Characterization of ASTM F75 Co-Cr Alloy Obtained by Selective Laser Melting (SLM) and Casting Techniques

2017 ◽  
Vol 899 ◽  
pp. 323-328 ◽  
Author(s):  
Marcello Vertamatti Mergulhão ◽  
Carlos Eduardo Podestá ◽  
Maurício David Martins das Neves
Keyword(s):  
Mechanical Properties ◽  
Selective Laser Melting ◽  
Rupture Strength ◽  
Microstructural Characterization ◽  
Tensile Yield Strength ◽  
Uniaxial Tensile ◽  
Laser Melting ◽  
Standard Samples ◽  
X Ray ◽  
Astm F75

Advances in processes using the powder metallurgy techniques are making this technology competitive compared to the other traditional manufacturing processes, especially in medicine area. The additive rapid prototyping technique – selective laser melting (SLM) was applied in a biomaterial of CoCrMoFe alloy (ASTM F75), to study the mechanical properties and microstructural characterization in comparison between the conventional technique – casting. The gas atomized powder was investigated by their physical (as apparent density, bulk density and flow rate) and the chemical properties. The powder was analyzed using scanning electron microscope with energy-dispersed X-ray spectroscopy (SEM-EDS) and X-ray fluorescence. Specimens of standard samples were manufactured using these techniques to evaluate the mechanical properties as uniaxial tensile (yield strength, rupture tensile and elongation), transverse rupture strength and the micro hardness. The mechanical properties showed higher values in the SLM specimens than the casting specimens. Before the mechanical tests the specimens were examined using optical microscope (OM) and SEM-EDS. The micrographs revealed a microstructure with finer morphology in the SLM technique and the dendrites in the casting technique.

Triaxially Woven Fabrics: Their Structure and Properties

1971 ◽  
Vol 41 (8) ◽  
pp. 637-647 ◽  
Author(s):  
John Skelton
Keyword(s):  
Mechanical Properties ◽  
Shear Resistance ◽  
Woven Fabrics ◽  
Small Samples ◽  
Structure And Properties ◽  
Open Area ◽  
Warp Yarn ◽  
Bending Behavior ◽  
The Stability ◽  
Weave Pattern

A loom developed for producing small samples of triaxially woven fabrics was used to weave experimental amounts of fabric from coarse string, from 3-ply, 840-den nylon yarn and from graphite yarn. The shedding and warp yarn indexing motions are controlled by a series of cams mounted on a cam roll. The sequence of cams can be changed to produce various weave patterns; changes in weave pattern can also be produced for any particular cam roll by varying the sequence of shedding and indexing motions. The nylon triaxial fabric and a range of square orthogonal fabrics woven from the same yarn were evaluated for various structural and mechanical properties. The stability of the triaxial fabric is much greater than that of an orthogonal fabric with the same percent open area. The triaxial fabric exhibits greater isotropy in its bending behavior and a greater shear resistance than a comparable orthogonal fabric.

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