نتایج جستجو برای: hardness strength

تعداد نتایج: 229077  

Sabet, H., Razavi, A.S. ,

In this research, the FSW Butt joint of commercial aluminum 1050 was investigated by using the 7075 aluminum alloy interlayer on the linear velocity of 30, 50 and 100 mm / min, and rotational speeds of 800 and 1200 rpm. A threaded cylindrical tool was used for joining of the 5 mm sheets. The OM, SEM, microhardness and tensile tests were done. The results shows that in sample with an interlayer ...

A. Noorian, H. Saghafian, Sh. Kheirandish,

Abstract: mechanical properties of AISIH 13 hot-work tool steel have been studied. Cast samples made of the modified new steel were homogenized and austenitized at different conditions, followed by tempering at the specified temperature ranges. Hardness, red hardness, three point bending test and Charpy impact test were carried out to evaluate the mechanical properties together with characteriz...

Journal: :Rigakuryoho Kagaku 2022

[Purpose] The purpose of this study was to determine the effects acupressure strength on muscle hardness. [Participants and Methods] Both legs 21 healthy adult males (n=42) were investigated in study. Acupressure strengths 2, 4, 6, 8 kg (equivalent 830, 1440, 1990, 2230 g/cm2, respectively) applied tibialis anterior each leg for 60 s. point at 25% length lower from inferior edge patella. Muscle...

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Single phase brass strips with 2 mm thickness were severely deformed through 1 and 3 cycles of accumulative roll bonding process (ARB). ARB process effectively increased the hardness, yield strength, and the ultimate strength of the processed materials. The hardness of processed material increased from 95 HV in annealed material to 225 HV in 3 cycle ARBed material, and the yielding and ultimate...

2014
Süleyman Korkut Ayhan Aytin

The aim of this study is to determine the change of some physical properties (oven-dry density, weight loss, swelling and anti-swelling efficiency) and mechanical properties (compression strength parallel to grain, bending strength, modulus of elasticity in bending, janka-hardness (cross-section, radial, tangential), impact bending strength and tension strength perpendicular to grain) of wild c...

Journal: :journal of mechanical research and application 2012
sh. jafarzadeh h. bisad h. miyanaji e. zeynali

one of the most common methods for production of ultra fine grained materials is severe plastic deformation (spd). in this study, constrained groove pressing (cgp) and high pressure torsion (hpt) processes as effective methods of severe plastic deformation for the strain imposed on the pure copper were used. this paper presents the results of an experimental research, to review the influence of...

Journal: :international journal of iron & steel society of iran 2015
h. sharifi i. kheirollahi-hosseinabadi r. ghasemi

to investigate the effect of tempering treatment on mechanical properties and the microstructure ofdin 1.4021 martensitic stainless steel, austenite treatment was conducted for the samples at 1000ºc temperature for 60 min and then the samples were oil quenched. later, tempering treatments wereperformed for the samples at 500 ºc and 700 ºc temperatures for 2 and 5 h, respectively; then quenching...

2014
G.Surya Prakash Rao Abhijith Datta

This paper deals with Friction stir welding of AZ31B Mg alloy by using H13 Tool at different rotational speeds and welding speeds .Experiments were conducted according to L4 Orthogonal array which was suggested by Taguchi. Optimum parameters for optimum Tensile strength, Hardness and Ductility were found with the help of S/N ratios. Therefore optimization of input process parameter is required ...

2016
Ruihua Li Baoyu Gao Qinyan Yue Huaili Zheng

In this study, the cationic lignin-based flocculant was prepared and used with polyferric chloride (PFC) to treat disperse and reactive dyes wastewater. The effects of dosage, initial pH, hardness and ionic strength on the interactions and floc properties were studied. Results showed that hydroxyl and quaternary ammonium groups of LBF could combine with -NHand sulfo groups of dyes. Large flocs ...

Journal: :Dental materials journal 2013
Soo-Kyung Jun Dong-Ae Kim Hyo-Jin Goo Hae-Hyoung Lee

The aim of this study was to investigate the relationship between the different mechanical properties with the filler fraction of various resin composites. Mechanical properties of eighteen different resin composites were investigated in this study; flexural strength (FS), flexural modulus (FM), fracture toughness (FT), compressive strength (CS), diametral tensile strength (DTS), Barcol hardnes...

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