Comparison of Experimental and Numerical Study on Superplastic Forming of Rectangular Box Shape using AZ31 Magnesium Alloy Sheet

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
G. Prabaharan ◽  
S. Ramesh Babu ◽  
K. Parthasarathy ◽  
K.A. Rajkumar
Keyword(s):  
Magnesium Alloy ◽  
Numerical Study ◽  
Superplastic Forming ◽  
Alloy Sheet ◽  
Grain Structure ◽  
Az31 Magnesium Alloy ◽  
Dome Height ◽  
Super Plastic ◽  
Plastic Forming ◽  
Super Plastic Forming

Super plastic forming has become a feasible process in manufacturing aircraft and automobile parts. Super-plasticity is a property of certain metallic materials which enable them to attain very high elongations (100% and above) without necking under certain conditions. This is assigned to the viscous behaviour exhibited by certain metals and alloys with very fine and stable grain structure at temperatures above half of the melting point. The experimental setup was developed for finding the parametric influences and their effects on super plastic forming. AZ31 Magnesium alloy is most suitable materials for producing more complex shapes using super plastic forming method. The experimental values of pressure, temperature and the thinning, dome height of the super plastically formed specimens were analysed.

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.

Numerical-Experimental Characterization of a Superplastic AZ31 Magnesium Alloy

2007 ◽  
Vol 551-552 ◽  
pp. 317-322 ◽  
Author(s):  
G. Palumbo ◽  
Donato Sorgente ◽  
Luigi Tricarico ◽  
S.H. Zhang ◽  
W.T. Zheng ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Biaxial Tension ◽  
Thickness Distribution ◽  
Alloy Sheet ◽  
Experimental Results ◽  
Az31 Magnesium Alloy ◽  
Dome Height ◽  
Fe Model ◽  
Flow Parameters ◽  
Hot Rolled

In this work the superplastic behaviour of a hot rolled AZ31 magnesium alloy sheet under a biaxial tension test with the blow forming technique is presented and reported. The specimen dome height and its thickness distribution, during and after the test, have been used as characterizing parameters. A numerical FE model of the test has been developed in order to easily characterize the material and to directly analyze experimental results. The influence of the rolling cycle on the microstructure and consequently on the material behaviour has been also analyzed. A synergic use of experimental results and of the numerical model has been done for finding material constants in different situations. The material flow parameters have been found and results are presented.

scholarly journals Superplastic Forming of AZ31 Magnesium Alloy Sheet into a Rectangular Pan

2002 ◽  
Vol 43 (10) ◽  
pp. 2443-2448 ◽  
Author(s):  
Abdel-Wahab El-Morsy ◽  
Ken-ichi Manabe ◽  
Hisashi Nishimura
Keyword(s):  
Magnesium Alloy ◽  
Superplastic Forming ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Magnesium Alloy Sheet ◽  
Az31 Magnesium Alloy Sheet

Numerical Study of Radiation and Temperature Phenomena for Improved Super-Plastic Sheet Metal Forming

2012 ◽  
Vol 735 ◽  
pp. 170-179
Author(s):  
Michal Mis ◽  
Richard Hall ◽  
Julian Spence ◽  
Nwabueze Emekwuru ◽  
Kevin Kibble
Keyword(s):  
Numerical Study ◽  
Process Efficiency ◽  
Work Piece ◽  
Heat Management ◽  
Selective Heating ◽  
Super Plastic ◽  
Plastic Forming ◽  
Improved Design ◽  
Super Plastic Forming ◽  
Accurate Temperature Control

In most super-plastic forming (SPF) investigations the focus is usually on the material aspects. In this paper the authors develop a model to improve the heat management of SPF. The model presented improved process possibilities. The improved design involves selective application of heat to the material. Final product shape can easily be controlled by accurate temperature control of the work piece. Numerical simulation has been carried out on various components including a ‘top hat shape‘ and a heat exchanger part. Simulation comparisons are made between selective heating and conventional processing, where all of the formed material is at the same temperature, and greater process efficiency of the selective heating approach is demonstrated.

Modeling the Super Plastic Forming of a Multi-Sheet Diffusion Bonded Titanium Alloy Demonstrator Fan Blade

2012 ◽  
Vol 735 ◽  
pp. 215-223 ◽  
Author(s):  
Paul Wood ◽  
Muhammad Jawad Qarni ◽  
Paul L. Blackwell ◽  
Vladimir Cerny ◽  
Phillip Brennand ◽  
...  
Keyword(s):  
Finite Element ◽  
Titanium Alloy ◽  
Inner Core ◽  
Alloy Sheet ◽  
The Core ◽  
Super Plastic ◽  
Plastic Forming ◽  
Fan Blade ◽  
Super Plastic Forming ◽  
2D And 3D

The paper describes a finite element method in 2D and 3D to simulate the super plastic forming of a demonstrator jet engine fan blade made from Titanium alloy sheet. The fan blade is an assembly of three sheets in which a single inner (core) sheet is diffusion bonded to the two outer (skin) sheets at prescribed zones, which is then super-plastically formed to a desired fan profile. In the model, the diffusion bonded zones between the core and skin sheets are simulated using tied interfaces. The thickness of each skin sheet is not uniform and significant change in thickness can occur over a short distance as well as gradually over the entire skin sheet. The thickness of the core sheet which is smaller than the thickness of each skin sheet remains uniform. The paper describes the design for a scaled-down demonstrator fan blade and model build process. Selected results and evaluations of finite element simulations are presented and discussed.

Finite Element Analysis on Optimized Condition of Super Plastic Forming of AZ31B Magnesium Alloy Sheets

2017 ◽  
Vol 4 (6) ◽  
pp. 6678-6687
Author(s):  
K. Sathish ◽  
S.T. Selvamani ◽  
P. Ramesh ◽  
D. Sivakumar ◽  
M. Vigneshwar ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Magnesium Alloy ◽  
Element Analysis ◽  
Az31b Magnesium Alloy ◽  
Super Plastic ◽  
Plastic Forming ◽  
Super Plastic Forming

INCONEL ALLOY 718SPF

Alloy Digest ◽  
1994 ◽  
Vol 43 (11) ◽  
Keyword(s):  
Base Alloy ◽  
Low Flow ◽  
Inconel Alloy ◽  
Gamma Prime ◽  
Size Stability ◽  
Super Plastic ◽  
Plastic Forming ◽  
Super Plastic Forming ◽  
Grain Size Stability ◽  
Prime Phase

Abstract INCONEL alloy 718SPF is an age-hardenable austenitic material whose strength is largely dependent on the precipitation of a gamma prime phase following heat treatment. The base alloy, however, possesses two-essential characteristics for super-plastic forming; grain size stability over time and temperature; and a combination of low flow stress and significant ductility. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on low and high temperature performance. Filing Code: Ni-471. Producer or source: Inco Alloys International Inc.

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