The Cold Rolling Effects on the Microstructure and Micro-Hardness of Al-Mg-Si Alloy

2018 ◽  
Vol 18 ◽  
pp. 14-18 ◽  
Author(s):  
Hichem Farh ◽  
Hanna Belghit ◽  
Toufik Ziar ◽  
Abdelouahab Noua ◽  
Fares Serradj
Keyword(s):  
Vickers Microhardness ◽  
Microstructural Properties ◽  
Micro Hardness ◽  
Metal Sample ◽  
Characterization Methods ◽  
Common Technique ◽  
Deformation Level ◽  
Mechanical And Microstructural Properties ◽  
Texture Characterization ◽  
Level Reduction

Rolling is a very common technique for shaping sheet metal. It aims to reduce the thickness of a metal sample to adapt it to the usual conditions of use in the industry. Nevertheless, this technique is not without modifying the mechanical and microstructural properties of the materials that can influence the mechanical strength of shaped parts. The purpose of the present investigation is to study the changes in microstructures and micro-hardness of Al-Mg-Si alloy with different rolling reduction in thickness and following artificial aging treatments at 175° C . We notice that the micro-hardness increases with the increasing of the deformation level . Reduction in thickness shows a change in microstructure and texture. Characterization methods used in this work is: Optical Microscopy (OM) and, Vickers microhardness.

scholarly journals Mechanical and microstructural properties of EN AW-6060 aluminum alloy joints produced by friction stir welding

2015 ◽  
Vol 63 (2) ◽  
pp. 475-478
Author(s):  
I. Küçükrendeci
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Room Temperature ◽  
Weld Zone ◽  
Tensile Tests ◽  
Optical Observations ◽  
Microstructural Properties ◽  
Micro Hardness ◽  
Friction Stir ◽  
Mechanical And Microstructural Properties

Abstract In the study, the mechanical and microstructural properties of friction stir welded EN AW-6060 Aluminum Alloy plates were investigated. The friction stir welding (FSW) was conducted at tool rotational speeds of 900, 1250, and 1500 rpm and at welding speeds of 100, 150 and 180 mm/min. The effect of the tool rotational and welding speeds such properties was studied. The mechanical properties of the joints were evaluated by means of micro-hardness (HV) and tensile tests at room temperature. The tensile properties of the friction stir welded tensile specimens depend significantly on both the tool rotational and welding speeds. The microstructural evolution of the weld zone was analysed by optical observations of the weld zones

Microstructural Evolution and Mechanical Properties during Homogenization and Ageing Treatment of Al-Mg-Si Alloy Wire Cold Drawn

2018 ◽  
Vol 36 ◽  
pp. 60-68 ◽  
Author(s):  
Mokhtar Bayarassou ◽  
Mosbah Zidani ◽  
Hichem Farh
Keyword(s):  
Mechanical Properties ◽  
Electric Energy ◽  
Cold Drawing ◽  
X Ray Diffraction ◽  
Homogenization Treatment ◽  
Characterization Methods ◽  
Alloy Wire ◽  
X Ray ◽  
Deformation Level ◽  
Texture Characterization

The objective of the present investigation is to study the changes in microstructures and mechanical properties during ageing and homogenization treatment of Al-Mg-Si alloy wire cold drawn at the different deformation in ENICAB (Biskra), destined for the transport of electric energy. And also to understand the phase formation during the cold drawing of Al-Mg-Si alloy wires, as well as the combined influence of the plastic deformation level and the influence of aging temperature. Wire section reduction shows a change in microstructure and texture. Characterization methods used in this work is: Optical Microscopy (OM), Scanning Electron Microscope (SEM) and X-ray diffraction.

scholarly journals Microstructure and mechanical behavior of similar and dissimilar AA2024 and AA7039 friction stir welds

2020 ◽  
Vol 41 (1) ◽  
pp. 21-33
Author(s):  
Chaitanya Sharma ◽  
Vikas Upadhyay
Keyword(s):  
Fracture Mode ◽  
Energy Dispersive Spectrometry ◽  
Hardness Test ◽  
Tensile Fracture ◽  
Microstructural Properties ◽  
Micro Hardness ◽  
Dissimilar Joints ◽  
Friction Stir ◽  
Mechanical And Microstructural Properties

In this work, similar and dissimilar friction stir welds of AA2024 and AA7039 were formed using optimized process parameters and truncated threaded tool. Characterization of weld joints for mechanical and microstructural properties was performed by tensile test, micro hardness test, optical microscopy, scanning electron microscopy, and energy dispersive spectrometry. The tensile strength of similar joints was higher than dissimilar joints despite lower microhardness of former. Fracture of FSW joints was found to be started by the fracture of strengthening precipitate θ or η or both in the region of tensile fracture. Dissimilar joints and similar joints of AA7039 exhibited ductile fracture mode while similar joints of AA2024 showed brittle fracture mode.

Evaluating Micro-Structure, Hydration and Thermal Expansions of Cement Containing Nano-Silica

GIS Business ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. 158-165 ◽  
Author(s):  
Dr. Sarvesh PS Rajput
Keyword(s):  
Portland Cement ◽  
Mechanical Characteristics ◽  
Microstructural Properties ◽  
Nano Silica ◽  
Micro Structure ◽  
Microstructural Characteristics ◽  
Mechanical And Microstructural Properties

This study reported that the addition of nano-silica enhances the mechanical characteristics of concrete as its compressive, flexural and tensile split strengths are increased. As a comparison mixture to equate it along with nano-modified concrete, ordinary samples of Portland cement (OPC) have been utilized. Herein, upto 6.0 percent of OPC has been substituted by nanosilica. In fact, the introduction of nanosilica improves mechanical and microstructural characteristics of concrete by significantly (28 to 35%). The finding therefore, indicated that partly replacing OPC with up to 5 percent nanosilica increases the mechanical and microstructural properties cured up to ninety days as opposed to the standard OPC mix.

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