Numerical Simulation for Temperature Field of ZK60 Magnesium Alloy Sheet Butt-Welded in GTAW Hybrid a Longitudinal Electromagnetic Field

2011 ◽  
Vol 215 ◽  
pp. 5-8 ◽  
Author(s):  
Jian Luo ◽  
X.M. Wang ◽  
Fei Li ◽  
Quan Xiang Luo
Keyword(s):  
Electromagnetic Field ◽  
Magnesium Alloy ◽  
Heat Input ◽  
Arc Welding ◽  
Alloy Sheet ◽  
Gas Tungsten Arc Welding ◽  
Welding Seam ◽  
Magnesium Alloy Sheet ◽  
Gas Tungsten Arc ◽  
Zk60 Magnesium Alloy

The ZK60 magnesium alloy sheet butt-welded in gas tungsten arc welding with different heat input are analyzed and simulated. A double-ellipsoid heat source and the temperature-dependent thermo-physical properties of ZK60 magnesium alloy sheet are employed for performing a non-linear transient thermal analysis by a finite element method. The effect of heat input on welding seam geometry has been studied. As a calculated result, the welding voltage, welding speed and the welding current are the main factors to determine the welding seam geometry. The different welding temperature fields between the general gas tungsten arc welding (GTAW) and GTAW hybrid a longitudinal electromagnetic field (LMF-GTAW) have been achieved.

Tailor-Welded Blanks Manufactured and Stamping Properties of Magnesium Alloy

2010 ◽  
Vol 148-149 ◽  
pp. 241-244
Author(s):  
Zhong Tang Wang ◽  
Shi Hong Zhang ◽  
Guang Xia Qi ◽  
Rong Hui Chang
Keyword(s):  
Magnesium Alloy ◽  
Heat Affected Zone ◽  
Alloy Sheet ◽  
Experiment Study ◽  
Magnesium Alloy Sheet ◽  
Gas Tungsten Arc ◽  
Tailor Welded Blanks ◽  
Forming Temperature ◽  
Welding Properties ◽  
Welded Seam

Magnesium alloy tailor-welded blanks(MTWBs) of AZ31 and AZ80 sheet had been manufactured by gas tungsten arc welded(GTAW), which the thickness were 0.8mm. The welding properties of Magnesium alloy sheet had been analyzed, and the technology parameters of GTAW were determined by experiment study, which was that welding thread being Φ2.0mm, welding electricity 50A, welding voltage 9V, welding rate 12—13cm/min. The research results presented that the grain in welded seam was isometric crystal, and the grains were branching crystal in heat-affected zone (HAZ). For MTWBs of AZ31and AZ80 sheet which the thickness was 0.8mm, the forming parameters were that the forming temperature of AZ31 being 190-220°C, and forming temperature of AZ80 being 310°C-350°C, and the temperature of tools is 180°C~200°C.

Forming Behaviour at Elevated Temperature of a Laser Heat-Treated AZ31 Magnesium Alloy Sheet

2018 ◽  
Vol 941 ◽  
pp. 1270-1275
Author(s):  
Donato Sorgente ◽  
Gianfranco Palumbo ◽  
Alessandro Fortunato ◽  
Alessandro Ascari ◽  
Ali Arslan Kaya
Keyword(s):  
Magnesium Alloy ◽  
Heat Input ◽  
Elevated Temperatures ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Dome Height ◽  
Magnesium Alloy Sheet ◽  
Laser Heat ◽  
Az31 Magnesium Alloy Sheet ◽  
Forming Behaviour

The tailoring of mechanical and technological properties of the initial material in sheet metal forming has been widely investigated and successfully applied. The benefits of such an approach can be found in the improvement of both the post-forming performances of the manufactured component and the forming process capabilities. Different strategies can be found and most of them involve a microstructural alteration by a selective heat source (e.g. laser, induction, UV light). The use of aluminium alloys combined with these strategies has been extensively investigated, while magnesium alloys are almost not yet considered from this viewpoint. In this work, we investigated the effect of a selective laser heat treatment on an AZ31 magnesium alloy sheet. After laser heat treating a single track in the centre of a blank with different heat input values, bulge tests at elevated temperatures were conducted. The dome height evolution was continuously acquired during the tests and differences between the untreated specimen and the laser treated ones have been characterized. The effect of the laser treatment was evaluated also in terms of thickness distribution of the formed specimens. A thickness discontinuity was found along the treated specimens in the transition zone between the treated and the untreated material. Results highlighted that an effective change in the forming behaviour can be induced in the treated zone depending on the laser heat input. It has thus been shown that this approach can be employed for tailoring the magnesium alloy blank properties prior to the gas forming at elevated temperatures.

scholarly journals A Study on Fusion Repair Process for a Precipitation Hardened IN738 Ni-Based Superalloy

1999 ◽  
Author(s):  
Dae-Young Kim ◽  
Jong-Hyun Hwang ◽  
Kwang-Soo Kim ◽  
Joong-Geun Youn
Keyword(s):  
Optimum Condition ◽  
Laser Welding ◽  
Laser Cladding ◽  
Heat Input ◽  
Arc Welding ◽  
Repair Process ◽  
Gas Tungsten Arc Welding ◽  
Repair Processes ◽  
Gas Tungsten Arc ◽  
Welding Heat Input

Several fusion repair processes such as laser cladding, laser welding and gas tungsten arc welding have been taken into consideration for repairing IN738 precipitation hardened Ni-based superalloy material. Effect of heat input on weld cracking susceptibility has been studied to obtain optimum condition for crack free welds. Variations in cracking susceptibility as a function of welding heat input is discussed with reference to metallurgical characteristics of the welds.

A Study on Fusion Repair Process for a Precipitation Hardened IN738 Ni-Based Superalloy

2000 ◽  
Vol 122 (3) ◽  
pp. 457-461 ◽  
Author(s):  
Dae-Young Kim ◽  
Jong-Hyun Hwang ◽  
Kwang-Soo Kim ◽  
Joong-Geun Youn
Keyword(s):  
Optimum Condition ◽  
Laser Welding ◽  
Laser Cladding ◽  
Heat Input ◽  
Arc Welding ◽  
Repair Process ◽  
Gas Tungsten Arc Welding ◽  
Repair Processes ◽  
Gas Tungsten Arc ◽  
Welding Heat Input

Several fusion repair processes such as laser cladding, laser welding and gas tungsten arc welding have been taken into consideration for repairing IN738 precipitation hardened Ni-based superalloy material. Effect of heat input on weld cracking susceptibility has been studied to obtain optimum condition for crack-free welds. Variations in cracking susceptibility as a function of welding heat input is discussed with reference to metallurgical characteristics of the welds. [S0742-4795(00)02003-2]

Role of one direction strong texture in stretch formability for ZK60 magnesium alloy sheet

2018 ◽  
Vol 730 ◽  
pp. 162-167 ◽  
Author(s):  
Wenke Wang ◽  
Limin Ma ◽  
Shaochun Chai ◽  
Wencong Zhang ◽  
Wenzhen Chen ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Alloy Sheet ◽  
Magnesium Alloy Sheet ◽  
Stretch Formability ◽  
Zk60 Magnesium Alloy
Sign in / Sign up

Export Citation Format

Share Document