Studying the Effect of Different Combinations of Salt Modifier on the Mechanical Properties and Microstructure of A356 Al-Si Alloy

The present study aims to develop A356 Al-Si alloy using high purity aluminium and various master alloy in gas fired pit furnace. Three different ratio of salt modifier (1:1, 1:2 & 1:3) was used to prepare the casting. Sand casting and permanent mould casting techniques were used to prepare the alloys. Optical microscope and universal tensile testing machine were used for the metallurgical evaluation of the prepared alloy. It was observed that the addition of modifier improved the mechanical properties and microstructure of the alloy. It was also observed that modifying agent NaF with CaCl2in 1:1 ratio has shown the best results in terms of microstructure and the mechanical properties.

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Heat Treatment, Mechanical Properties and Microstructure of T-Joint Steel Arc Welded

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.876.36 ◽

2018 ◽

Vol 876 ◽

pp. 36-40

Author(s):

Yustiasih Purwaningrum ◽

Dwi Darmawan ◽

Panji Lukman Tirta Kusuma

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Tensile Strength ◽

Weld Metal ◽

Testing Machine ◽

Optical Microscope ◽

Heat Treatments ◽

Tensile Testing Machine ◽

Weld Metals ◽

Quenching Process

Heat treatment of T-Joint’s steel arc welded are performed are investigated in this research. The heat treatment process that used were annealing and quenching. The microstructure was investigated by optical microscope. The mechanical behavior of the samples was investigated using universal tensile testing machine for tensile test and Microvickers hardness method for hardness testing. The microstructure of welding zone of welding metals with various heat treatments is grain boundary ferrite, Widmanstatten ferrite and acicular ferrite. The weld metal with quenching treatment has a highest tensile strength with tensile strength 197.97 Mpa. The quenching process increases the tensile strength by 49.58 %. The distortion value in weld metal without heat treatment, quenching and annealing is 0.11mm; 0.04 mm and 0.08 mm respectively. The hardness number of weld metals with quenching process have a highest number base metal, HAZ and weld metals. Results showed that the mechanical properties of T-joints steel arc welded can be improved by various heat treatments.

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Effect of B Refinement on Structure and Fracture Morphology of Al-7 wt.% Si Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.590.181 ◽

2014 ◽

Vol 590 ◽

pp. 181-186

Author(s):

Xiao Song Li ◽

An Hui Cai ◽

Ji Jie Zeng

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Scanning Electron Microscopy ◽

Tensile Testing ◽

Testing Machine ◽

Fracture Morphology ◽

Optical Microscope ◽

Tensile Testing Machine ◽

Alloy Microstructure ◽

Scanning Electron

Using optical microscope, electronic tensile testing machine, scanning electron microscopy methods, such as detailed treatment of the B hypoeutectic Al-Si alloy microstructure, mechanical properties and fracture morphology were studied. The results showed that after treatment by the B refinement, α-Al dendrite phase was refined, resulting in mechanical properties of Al-Si alloy significantly improved. Which, B content 0.036wt.%, the alloy the best, the σb, δ, respectively, than the non-thinning increased 67.8% and 15.2%. From the fracture surface, the fracture morphology of the specimen showed a quasi-cleavage fracture. Which, B content 0.036wt.% at the time of fracture is more deep dimples, and a good plastic toughness.

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The Influence of Casting Geometry on the Tensile Properties and Residual Stresses in Aluminium Castings

Materials Science Forum ◽

10.4028/www.scientific.net/msf.652.174 ◽

2010 ◽

Vol 652 ◽

pp. 174-179

Author(s):

Mohsen Sadrossadat ◽

Sten Johansson

Keyword(s):

Mechanical Properties ◽

Residual Stress ◽

Residual Stresses ◽

Testing Machine ◽

Optical Microscope ◽

Microstructural Development ◽

Stress Evolution ◽

Rectangular Grid ◽

Tensile Testing Machine ◽

Microstructure And Mechanical Properties

The soundness and the performance of castings are significantly affected by generation and accumulation of residual stresses. This has been proven that mechanical properties and residual stresses level of the casting components are affected by thermal gradient across the casting component during cooling and some intrinsic physical properties of the material. In the present work, microstructural development, mechanical properties, residual stress evolution and cooling curves associated with different legs of a mixed–section grid castings have been investigated employing scanning electron microscope, optical microscope, 3D measurement equipment, computerized thermal data acquisition instrument and tensile testing machine. Experimental results show that the accumulated residual stress in circular, triangular and rectangular grid shapes is increasing respectively. From the results it can be seen that there are clear influences of grid’s geometry on the microstructure and mechanical properties. The geometrical stiffness can affect a lot the residual stress level and the casting modulus has a big influence on the microstructure and mechanical properties.

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Studies on Nanostructured Polyurethane/Clay Interpenetrating Polymer Networks

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.1001 ◽

2005 ◽

Vol 475-479 ◽

pp. 1001-1004

Author(s):

Ninglin Zhou ◽

Xiao Xian Xia ◽

Li Li ◽

Shao Hua Wei ◽

Jian Shen

Keyword(s):

Mechanical Properties ◽

Polymer Networks ◽

Testing Machine ◽

Physical And Mechanical Properties ◽

Interpenetrating Polymer Networks ◽

Absorption Properties ◽

Tensile Testing Machine ◽

Swelling Agent ◽

Silicate Layers ◽

Polyurethane Matrix

A novel exfoliated polyurethane (PU)/clay Interpenetrating Polymer Networks (IPNs) nanocomposite has been synthesized with polyurethane and organoclay. MTPAC is used as swelling agent to treat Na-montmorillonite for forming organoclay. The results indicate that there is very good compatibility between organoclay and PU. Nanoscale silicate dispersion was analyzed by XRD. The mechanical properties of the nanocomposites have been measured by tensile testing machine. The nanocomposites show obviously improved physical and mechanical properties when compared with the pure polymer. Additionally, PU /MTPAC- clay shows lower water absorption properties than pure PU do. In addition, the reinforcing and intercalating mechanism of silicate layers in polyurethane matrix are discussed.

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Investigation on Biocompatibility and Mechanical Properties of Ti15Mg Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1039.557 ◽

2021 ◽

Vol 1039 ◽

pp. 557-564

Author(s):

Haydar Abdul Hassan Al-Ethari ◽

Sundus Abbas Jasim ◽

Ekhlas Khalid Zamel

Keyword(s):

Mechanical Properties ◽

Wear Behavior ◽

Research Work ◽

Wear Test ◽

Optical Microscope ◽

Alloy Sample ◽

Microscope Analysis ◽

Good Biocompatibility ◽

Prepared Alloy

In this research work, bioactive Ti15Mg alloy was prepared by powder metallurgy route to investigate its biocompatibility and mechanical properties. Many tests were performed including X-ray diffraction; optical microscope analysis, scanning electron microscope analysis, ultrasonic wave test, corrosion behavior test, Static immersion test, and the wet sliding wear test. The XRD result shows that the prepared alloy sample consist of (α-Ti phase) and Mg. The microstructure of the prepared alloy sample consisted of a biodegradable Mg or pore and alpha titanium. The effect of the Mg content on degradability was tested based on simulated body fluid of Ringer solutions using electrochemical corrosion. The findings indicate that an elastic modulus of 47GPa exhibits the alloy. There were low corrosion rates of the alloy. The Ti matrix remained integrity after 14 days of immersion in the Ringer solutions, and the magnesium phase dissolved in the solution, causing a layer to form on the alloy. The wear behavior of the prepared ally at wet sliding conditions was evaluated using pin on disc method. The in vitro analysis showed good biocompatibility with Ti15Mg alloy. The prepared alloy demonstrates good biocompatibility and bioactivity.

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Influence of Al-10RE Modification on Microstructure and Mechanical Properties of ZL203 Aluminum Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.365.98 ◽

2011 ◽

Vol 365 ◽

pp. 98-103

Author(s):

De Quan Shi ◽

Gui Li Gao ◽

Zhi Wei Gao ◽

Yan Liu Wang ◽

Xu Dong Wang

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Aluminum Alloy ◽

Mechanical Testing ◽

Testing Machine ◽

Optical Microscope ◽

Elongation Rate ◽

Holding Time ◽

Holding Temperature ◽

Universal Mechanical Testing Machine

The influence of Al-10RE addition, holding time and holding temperature on the microstructures and mechanical properties of ZL203 aluminum alloy has been studied respectively through using the optical microscope and the universal mechanical testing machine. The experimental results lead to the following conclusions. When Al-10RE addition is 1.0%-1.5%, the holding time is 15 minutes and the holding temperature is 730°C-750°C, the microstructure of Zl203 is perfect. With the increase of Al-10RE addition, the mechanical properties including tensile strength, elongation rate and hardness gradually increase. When the Al-10RE addition is 1.0%-1.5%, the mechanical properties reaches maximum. When the Al-10RE addition is above 1.5%, the mechanical properties decrease with the increase of Al-10RE addition.

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Effect of Er on Microstructure and Mechanical Properties of 5052 Aluminum Alloy with Big Width-To-Thickness Ratio

Materials ◽

10.3390/ma13030568 ◽

2020 ◽

Vol 13 (3) ◽

pp. 568

Author(s):

Xinwei She ◽

Xianquan Jiang ◽

Bao Qi ◽

Kang Chen

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Tensile Testing ◽

Testing Machine ◽

Thickness Ratio ◽

Tensile Testing Machine ◽

Microstructure And Mechanical Properties ◽

Long Time ◽

Scanning Electron ◽

Al Matrix

The effect of Er on microstructure and mechanical properties of the 5052 aluminum alloy with a big width-to-thickness ratio was investigated by a metallurgical microscope, scanning electron microscope and tensile testing machine. The results showed that the precipitates were slightly refined after Er addition and Al3Fe was transformed into Al6Fe and AlEr with/without a small amount of Fe or Si. The effect of Er on grain refinement was related to its content. When Er content was lower or higher than 0.4%, the grain would coarsen. Homogenization could refine the grain by controlling Er content and distribution in the Al matrix. Long time homogenization at high temperature would significantly reduce the strength of the 5052 aluminum alloy and 5052 aluminum alloys with low Er content, but help to improve the plasticity of those with high Er content. The ultimate tensile strength, yield strength and elongation of the as-cast 5052 aluminum alloy were 197 MPa, 117 MPa and 22.5% respectively. The strength was the highest, when Er content was 0.4 wt. % and the elongation was the best at 0.1 wt. % Er content.

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Effect of Cooling Rate on the Microstructural and Mechanical Properties of Sn-0.3Ag-0.7Cu-0.05Ni Solder Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.751.9 ◽

2017 ◽

Vol 751 ◽

pp. 9-13

Author(s):

Kogaew Inkong ◽

Phairote Sungkhaphaitoon

Keyword(s):

Mechanical Properties ◽

Cooling Rate ◽

Solder Alloy ◽

Testing Machine ◽

Optical Microscope ◽

Lead Free ◽

Lead Free Solder ◽

Cooling Systems ◽

Lead Free Solder Alloy ◽

Free Solder

The effect of cooling rate on the microstructural and mechanical properties of Sn-0.3Ag-0.7Cu-0.05Ni lead-free solder alloy was studied. The microstructure of specimens was characterized by using an optical microscope (OM) and an energy dispersive X-ray spectroscopy (EDX). The mechanical properties were performed by using a universal testing machine (UTM). The results showed that the cooling rate of water-cooled specimens was about 2.37 °C/s and the cooling rate of mold-cooled specimens was about 0.05 °C/s. To compare the different cooling rates, it was found that the grain size of water-cooled specimens was finer than that of the mold-cooled specimens, this resulted in an increment of mechanical properties of solder alloy. A higher tensile strength (33.10 MPa) and a higher elongation (34%) were observed when water-cooled and mold-cooled systems were used, respectively. The microstructure of Sn-0.3Ag-0.7Cu-0.05Ni lead-free solder alloy solidified by both cooling systems exhibited three phases: β-Sn, Ag3Sn and (Cu,Ni)6Sn5 IMCs.

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An Experimental Study on Effect of T-Joint’s Root Gap on Welding Properties

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.863.323 ◽

2017 ◽

Vol 863 ◽

pp. 323-327 ◽

Cited By ~ 2

Author(s):

Yustiasih Purwaningrum ◽

Panji Lukman Tirta Kusuma ◽

Dwi Darmawan

Keyword(s):

Mechanical Properties ◽

Base Metal ◽

Testing Machine ◽

Low Carbon Steel ◽

Physical And Mechanical Properties ◽

Optical Microscope ◽

Low Carbon ◽

Weld Metals ◽

A Value ◽

Welding Properties

The aimed of this research is to investigate the effect of T-Joint’s root gap on physical and mechanical properties of weld metal. Low carbon steel were joined in T-joint types using MIG (Metal Inert Gas) with variation of root gap. The root gap used were 0 mm, 3 mm and 6 mm. The physical properties examined with chemical composition, microstructure and corrosion using optical microscope. The mechanical properties were measured with respect to the strength and hardness using Universal testing machine and Vickers Microhardness. The results show that the highest value found in welds with a gap of 3 mm with a value of 163.57 MPa. Hardness value is directly proportional to the tensile strength of the material. The highest value found in welds with root gap of 3 mm, followed by root gap of 6 mm, and 0 mm Hardness values in the welding area is higher than the parent metal and HAZ because the number of Si, Mn and Cu elements in the welding metals are bigger than base metal. Weld with all variation of root gap have a good corrosion resistance because the corrosion rate in welds with various root gap have a value below 0.02 mmpy. Microstructure of weld metals were Accicular ferrite, Widmanstatten ferrite, and grain boundary ferrite, while microstructure of base metal and HAZ were ferrite and perlite.

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