Modelling of the flow behaviour of wrought aluminium alloys at elevated temperatures by a new constitutive equation

2014 ◽  
Vol 54 ◽  
pp. 869-873 ◽  
Author(s):  
M. El Mehtedi ◽  
F. Musharavati ◽  
S. Spigarelli
Keyword(s):  
Constitutive Equation ◽  
Aluminium Alloys ◽  
Elevated Temperatures ◽  
Flow Behaviour

Study on the Formability of Aluminium Alloy Sheets at Room and Elevated Temperatures

2016 ◽  
Vol 877 ◽  
pp. 393-399
Author(s):  
Jia Zhou ◽  
Jun Ping Zhang ◽  
Ming Tu Ma
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Elevated Temperature ◽  
Aluminium Alloy ◽  
Aluminium Alloys ◽  
Elevated Temperatures ◽  
Hot Stamping ◽  
Natural Aging ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet

This paper presents the main achievements of a research project aimed at investigating the applicability of the hot stamping technology to non heat treatable aluminium alloys of the 5052 H32 and heat treatable aluminium alloys of the 6016 T4P after six months natural aging. The formability and mechanical properties of 5052 H32 and 6016 T4P aluminum alloy sheets after six months natural aging under different temperature conditions were studied, the processing characteristics and potential of the two aluminium alloy at room and elevated temperature were investigated. The results indicated that the 6016 aluminum alloy sheet exhibit better mechanical properties at room temperature. 5052 H32 aluminum alloy sheet shows better formability at elevated temperature, and it has higher potential to increase formability by raising the temperature.

Microstructure and flow behaviour of a quenching and partitioning steel at elevated temperatures

2021 ◽  
pp. 1-11
Author(s):  
Zahra Sangarimotlagh ◽  
Mohamed Amin Karimi Asl ◽  
Amir Momeni ◽  
M. Soltanalinejad
Keyword(s):  
Elevated Temperatures ◽  
Flow Behaviour ◽  
Quenching And Partitioning

Materials—Metallic and Non-Metallic

1961 ◽  
Vol 65 (602) ◽  
pp. 83-85
Author(s):  
N. J. L. Megson
Keyword(s):  
High Temperature ◽  
Titanium Alloys ◽  
Aluminium Alloys ◽  
Elevated Temperatures ◽  
Maximum Temperature ◽  
Considerable Time ◽  
Heating Effects ◽  
Rain Erosion

With increasing speeds of aircraft, problems arise over materials of construction, partly through kinetic heating effects which cause temperature rises and partly through rain erosion effects. Additionally, account has to be taken of a required life of 30,000 hours which is much longer than that over which most materials are normally evaluated.For speeds of Mach 2.2, the maximum temperature attained will be of the order of 130°C, while for Mach 2.7 the corresponding temperature will be 200°C or higher. For the lower speed, it is probable that aluminium alloys will be satisfactory, although it must be emphasised that no information is yet available on the long-term behaviour of materials at the elevated temperatures likely to be experienced. Test programmes are in hand, but these will necessarily take considerable time for their completion. For speeds of Mach 2.7 or above, steel or titanium alloys will be required, but here again the necessary evaluation for long periods at high temperature has yet to be completed.

Constitutive Equation for Thermal Strain in the Mushy Zone during Solidification of Aluminium Alloys

2006 ◽  
Vol 508 ◽  
pp. 343-348 ◽  
Author(s):  
Aage Stangeland ◽  
Asbjørn Mo ◽  
Dmitry G. Eskin
Keyword(s):  
Constitutive Equation ◽  
Mushy Zone ◽  
Grain Refinement ◽  
Constitutive Relation ◽  
Aluminium Alloys ◽  
Thermal Strain ◽  
Thermal Contraction ◽  
Cast Sample ◽  
Cu Alloy ◽  
Solid Part

A constitutive equation for thermal strain in the mushy zone has recently been established [1]. The parameters in this constitutive relation are in the present study determined for the commercial alloys A356, AA2024, AA6061 and AA7075 in addition to an Al-4 wt% Cu alloy by combining experimentally measured contraction of a cast sample with thermomechanical simulations. The constitutive equation for thermal strain in the mushy zone reflects that there is no thermal strain in the solid part of the mushy zone at low solid fractions and that the thermal strain in the mushy zone approaches thermal contraction in fully solid as the solid fraction increases towards one. Experiments were performed at cooling rates in the range from 2 to 5.5 °C/s. The solid fractions when the tested alloys start to contract, gsth, are in the range from 0.63 to 0.94. Grain refinement increases gsthfor all the tested alloys.

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