نتایج جستجو برای: dissimilar welds

تعداد نتایج: 12046  

Journal: :Journal of manufacturing and materials processing 2022

Dissimilar friction stir spot welds (FSSW) between the magnesium and aluminum alloys are joined, using a novel approach called refill welding. The present work aims to evaluate macrostructural mechanical properties of welded AZ31B AA 6061-T6 in two combinations, i.e., identical Mg-to-Mg dissimilar Mg-to-Al joints, results compared with obtained conventional hardness profiles similar had appeara...

2008
Sheng-Long Jeng Hwa-Ten Lee Jiunn-Yuan Huang Roang-Ching Kuo

The purpose of this paper was to investigate the effects of Nb on the microstructure and elevated-temperature mechanical properties of Alloy 690-SUS 304L dissimilar welds. The results show that the welds were dominant with dendrites and interdendritic phases. In the low Nb welds, the main interdendritic phases were Nb-rich and Al-Ti-rich phases. Cr-carbides were precipitated along the grain bou...

2016
Anton S. Tremsin Supriyo Ganguly Sonia M. Meco Goncalo R. Pardal Takenao Shinohara W. Bruce Feller

A nondestructive study of the internal structure and compositional gradient of dissimilar metal-alloy welds through energy-resolved neutron imaging is described in this paper. The ability of neutrons to penetrate thick metal objects (up to several cm) provides a unique possibility to examine samples which are opaque to other conventional techniques. The presence of Bragg edges in the measured n...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2014
saman khalilpourazary reza abdi behnagh ramezanali mahdavinejad nasib payam

this study focused on the optimization of al—mg to cuzn34 friction stir lap welding (fslw) process for optimal combination of rotational and traverse speeds in order to yield favorable fracture load using grey relational analysis (gra). first, the degree of freedom was calculated for the system. then, the experiments based on the target values and number of considered levels, corresponding orth...

In this paper, dissimilar resistance spot welding of AISI 1075 eutectoid steel to AISI 201 stainless steel is investigated experimentally. For this purpose, the experiments are designed using response surface methodology and based on four-factor, five-level central composite design. The effects of process parameters such as welding current, welding time, cooling time and electrode force are inv...

H.A Mehrabi M Abbasi P Pourahmad

FSW material flow and phase transformation were studied at the interface of dissimilar welding of Al 6013 to Mg. Defect free butt weld was obtained when aluminum and magnesium test plates were placed in the advancing side and retreating side respectively, and the tool was placed 1 mm off the weld centerline into the aluminum side. In order to understand how the materials flow during FSW, steel ...

2004
A. Erhard

Ultrasonic inspection of dissimilar welds is still a challenge due to the different acoustic impedances across the interfaces between parent metals, welded, butter or cladded regions. Typically parent metals are fine grained carbon/ferritic/20MnMoNi55 steel, which show isotropic character. Whereas weld/butter/cladded metals are INCONEL/ austenitic steel, which exhibit anisotropic character, att...

Journal: :international journal of iron and steel society of iran 0
a. h. madadian department of materials engineering, science and research branch, islamic azad university, tehran h. najafi department of materials engineering, science and research branch, islamic azad university, tehran m. a. safarkhanian faculty of engineering, majlesi branch, islamic azad university, new isfahan city, isfahan, iran s. nategh department of materials engineering, science and research branch, islamic azad university, tehran. iran

mechanical properties of dissimilar weld joints between gost09ch16n4b (a martensitic stainless steel) and aisi 4130 thin sheets made by gas tungsten arc welding (gtaw) were studied using er410nimo and er100s-g filler metals in post weld heat treated conditions. heat treatment cycles consisted of austenitization at 900, 950 and 1000 °c for 1 h and this was followed by oil cooling and tempering a...

2017
Valeriy Demchenko Maksym Iurzhenko Andriy Shadrin Anatoliy Galchun

The paper presents results of the investigation of structure relaxation and thermal properties of PE-80 and PE-100 polyethylene hot-tool butt welds. It was found that a weld with the re-crystallized crystalline structure is formed during the welding of dissimilar types of polyethylene. It is shown that within a long period (1 year) the relaxation occurs not only in amorphous but also in the cry...

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