weldability of magnesium alloys was reported to be signiﬁcantly better with the Nd:YAG laser due to its shorter wave length. Leong investigated welding AZ31 alloy using both CO2 and pulsed Nd:YAG laser, and illustrated the difﬁculties of CO2 welding. He2.2.
AS-CAST AZ91D MAGNESIUM ALLOY PROPERTIES- EFFECT OF MICROSTRUCTURE AND TEMPERATURE “The journey of a thousand miles begins with one step.-Rumi To my parents, who had given me dreams to look forward toAS-CAST AZ91D
Magnesium alloys are some of lightest structural materials around. Magnesium AZ91D cast alloy is a high-purity alloy that has excellent corrosion resistance, excellent castablilty and good strength. It is the most commonly used magnesium die casting alloy.
Objective: The present work is aimed to find an optimum coination of cutting parameters to achieve low surface roughness in end milling of magnesium AM60 with TiN coated carbide tool under dry conditions. Methods: Design of Experiments (DOE) with Response Surface Methodology (RSM) using Box-Behnken design and the regression equations are used to find the optimal coinations of cutting
AZ91D MAGNESIUM ALLOY Sung-Chong Chung Hybrid System Design & Control Laboratory School of Mechanical Engineering, Hanyang University Seoul 133-791,KOREA ABSTRACT Semi-liquid injection (SLI) is called thixomolding process using thixotropic
hot tears in AZ91D magnesium alloy castings. The model is implemented in a general purpose casting simulation code. Mechanical properties are estimated using published data. The model predictions are compared with the experimental results of Bichler et al1.
In this study, a calcium phosphate coating was prepared on magnesium alloy AZ91D by chemical conversion. For the calcium phosphate coating, the effect of processing parameters on the microstructure and corrosion resistance was studied by scanning electron microscope (SEM) and electrochemical methods, and the coating composition was characterized by X-ray diffraction (XRD).
Magnesium AZ91D alloy chips provided by the Rongsheng Metal Group and machined using a milling machine with a mean size of 4 2 1 (mm) were used in this study for conversion into powder by planetary ball milling. Lubriing oil was used to prevent ignition
2013/9/19· In special LG trusts on magnesium parts for its mobile phones due to its lightness and hardness, but sought out a way to mass-produce the magnesium parts using an environmentally responsible method. The die casting process used to produce Eco-Magnesium components virtually eliminates use of damaging sulfur-hexafluoride (SF6) cover gases.
A corrosion rate smaller than 0.2 mm/year in 5 wt% NaCl solution is measured for the thixomolded AZ91D alloy. The corrosion behaviour was evaluated using immersion tests, electrochemical impedance spectroscopy, hydrogen evolution, glow discharge optical emission spectroscopy, and atomic emission spectroelectrochemistry.
adhesion properties [6–8]. One method for modifying and improving the surface characteristics of magnesium alloy surfaces is to use polymer coatings. A new and effective surface finishing technology to modify metal surfaces using bpolymer platingQ of 6
Evaluating the improvement of corrosion residual strength by adding 1.0 wt.% yttrium into an AZ91D magnesium alloy Qiang Wanga, Yaohui Liua,⁎, Shijie Fangb, Yulai Songa, Dawei Zhanga, Lina Zhanga, Chunfang Lia aKey Laboratory of Automobile Materials (Jilin University), Ministry of Eduion, College of Materials Science and Engineering, Jilin University,
This study is focused on enhancing surface characteristics of AZ91 alloy with the microarc oxidation (MAO) method and bringing in antibacterial susceptibility to it. It is aimed to bring in antibacterial effect of silver (Ag) to AZ91 magnesium base materials covered with the MAO method. The structural and chemical compositions of the coating were analysed by using XRD, SEM, and EDS. In order
Magnesium Alloy Mohamed Gobara Egyptian Armed Force, Kobry Elkobba, Cairo, Egypt E-mail address: [email protected] ABSTRACT AZ91D magnesium alloy was reinforced by titanium and boron carbides under an inert environment using in
study were composed of magnesium–aluminum-based alloy AZ91D (Mg–9Al–0.5Zn) in the as-cast condition. Ingots of AZ91D were melted in 430 stainless steel crucibles, the melt being protected under a CO 2–0.5%SF 6 gas mixture. After melting, they were
Magnesium AZ31B alloy can be welded using metal arc and gas tungsten arc welding techniques. Annealing Magnesium AZ31B alloy is stress relieved at 149°C (300°F) for …
The AZ91D magnesium alloy was chosen as experimental material, whose chemical composition was shown in Table 1. The test plates were cut into 10 m×10 mm coupons and polished to 1.5μm mirror finish. The surface was first ground with 000 SiC paper, followed by 500, No.2000, and finally 1.5μm diamond suspension in oil.
chemical performance of MAO coating on AZ91D magnesium alloy using step-down current method in phosphate and silie electrolytes in 5.0% NaCl solution. GUO et al  studied the corrosion resistance of MAO coating on AZ31B magnesium alloy in
Magnesium alloy AZ91D was subjected to solution heat-treatment at 380 OC for 8 hours and then at 420C for 24 hours in argon atmosphere followed by water quench at 25OC. The solution treated alloy was aged at 200OC for 24 hours using a vacuum oven.
The deformation behavior of AZ91D cast magnesium alloy was investigated using uniaxial tensile tests from room temperature up to 190 C and strain rates from 0.0001 up to 0.1 1/s. In present work gradient solidifiion in a Bridgeman furnace was employed to study the effect of initial microstructure on the tensile mechanical response of the AZ91D alloy.
An Electrodeposition Method for Preparing (Cu-Ni) /(Ni-Cu) Multilayers on Magnesium Alloy from Ionic Liquid Xingwu Guo*, Jiacheng Guo, Jie Dong, Shaohua Wang, Jia Gong, Rongyu Zhu, Wenjiang Ding *National Engineering Research Center of Light Alloys Net
Use of Grey-Taguchi Method for the Optimization of Oblique Turning Process of AZ91D Magnesium Alloy Bariş Buldum 1 , Uğur Eşme 1 , Mustafa Kemal Külekci 1 , Aydin Şik 2 and Yiğit Kazançoğlu 3
Using such approach the new method of nanostructural modifiion of Al–C–Ti-coating on the sample of the AZ91D magnesium alloy, based on the multi-pulse nanosecond laser irradiation with …
Magnesium alloy castings can be produced by nearly all of the conventional casting methods, namely, sand, permanent, and semi permanent mold and shell, investment, and die-casting. The choice of a casting method for a particular part depends upon factors such as the configuration of the proposed design, the appliion, the properties required, the total nuer of castings required, and the
Experiments, using a replie CO 2 snow nozzle in Bach''s study, were conducted for protection of the AZ91D alloy and pure magnesium in a 3-kg furnace to identify the protectiveness. The issue of CO 2 consumption was immediately apparent at the beginning of the phase-two tests using …
A. Magnesium A. Magnesium alloy B. XPS C. Oxidation abstract The oxidation rates, the morphologies and compositions of the surface ﬁlms on molten magnesium and AZ91D alloy in covering gas of 1,1,1,2-tetraﬂuoroethane/air at 760 C were investigated using