Artificial Ageing Effect on Mechanical, Electrical Properties and Positron Lifetime of Aircraft 2024 Alloy

2012 ◽  
Vol 329 ◽  
pp. 63-68 ◽  
Author(s):  
Abdullah A. Refaey ◽  
M. A. Abdel-Rahman ◽  
Emad A. Badawi
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Electrical Properties ◽  
Positron Lifetime ◽  
Artificial Ageing ◽  
Ageing Effect ◽  
2024 Aluminum Alloy ◽  
2024 Alloy ◽  
Constant Rate ◽  
Specific Temperature

Heat Treatments for Different Aging Times Were Performed on 2024 Aluminum Alloy. the Effect on the Positron Lifetime, Electrical and Mechanical Properties of the 2024 (Al-Cu-Mg) Alloy Was Studied. Artificial Ageing Was Conducted by Heating at a Constant Rate to a Specific Temperature, Followed by Annealing. the Alloy Was Treated at 192°C for Various Times, Followed by Annealing. Measurements as a Function of Aging Time Were Found to Exhibit Prominent Changes Related to the Formation of Precipitates.

The Boron Effect on Mechanical Properties of Aged 2024 Aluminum Alloy

2011 ◽  
Vol 339 ◽  
pp. 152-156
Author(s):  
Neda Khatami ◽  
Shamsoddin Mirdamadi ◽  
Hekmat Razavizadeh
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Aging Process ◽  
Precipitation Hardening ◽  
Natural Aging ◽  
2024 Aluminum Alloy ◽  
Pure Material ◽  
State Bearing ◽  
2024 Alloy ◽  
Element Addition

2024 Aluminum Alloy is widely used in aeronautical applications. The Alloy's strength is increased by Precipitation Hardening which is the aging and solution of strength and is widely used in T6 state. Bearing in mind the effect of Boron in shorting the aging time, the pure material of B2O3 was used in order to add Boron to 2024 Alloy, so Alloying was done. By testing mechanical properties and microstructure observations, good results were achieved in Boron effect on this alloy's quench in comparison with those alloys lacking Boron. The outcomes depicted that this element addition increases hardness and tensile strength in aging process. In a way that the hardness of the alloy after controlled quench in one hour natural aging was reached to 93HB from 73HB and to 134HB in one hour artificial aging in 110°C. Such difference in hardness amount is due to better distribution of precipitates.

Effect of Ageing on Microstructures, Electrical Properties and PALS of Aircraft Al Alloy 2024

2011 ◽  
Vol 319-320 ◽  
pp. 51-59 ◽  
Author(s):  
Abdullah A. Refeay ◽  
N.A. Kamel ◽  
M.A. Abdel-Rahman ◽  
Yahia A. Lotfy ◽  
Emad A. Badawi
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
Electrical Properties ◽  
Hardness Test ◽  
Al Alloy ◽  
Property Development ◽  
2024 Aluminum Alloy ◽  
Different Temperatures ◽  
Lcr Meter ◽  
Vickers Hardness Test

A comprehensive and systematic study using PALS technique, Vickers hardness test and electrical LCR meter were undertaken to follow property development during the recently promoted interrupted ageing treatment for 2024 aluminum alloy. In this work, solution heat treatments at different temperatures were performed in aircraft materials 2024 aluminum alloy. This work describes the development of the dependence of mechanical, electrical properties of 2024 Al-alloys on heat treatment to characterize microstructural changes during heat treatment. PALS, mechanical and electrical testing will be used to measure the features of the material as a function of time for each ageing temperatures.

Investigation of 2024 Aluminum Alloy Flange Semi-Solid Thixoforging by Changing Cavity

2013 ◽  
Vol 834-836 ◽  
pp. 425-431
Author(s):  
Zhi Ming Du ◽  
Jun Liu ◽  
Jia Hong Niu ◽  
Wang Qi Zhao ◽  
Sen Cong
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Theoretical Calculation ◽  
Influence Factors ◽  
Forming Limit ◽  
2024 Aluminum Alloy ◽  
Grain Sizes ◽  
Microstructure And Mechanical Properties ◽  
Fine Microstructure ◽  
Semi Solid

Microstructure and mechanical properties of 2024 aluminum alloy flange semi-solid thixoforging by changing cavity was investigated. Theoretical calculation and forming test were adopted to study the preparation of flange. It is concluded that the influence factors of forming limit of flanges are radical load P, friction τ and thickness t by theoretical calculation. The results show that it is uniform in the process of forming. Microstructure and mechanical properties of flange have been improved significantly with the increase of the radical load. Way of variable cavity realized the real plastic deformation, which results in high mechanical properties of flange. The flange could obtain fine microstructure with grain sizes of 20~30μm, tensile strength of 433MPa and elongation of 10.1%, with changing amount of 30MPa. The results indicate that the microstructure and mechanical properties could achieve forging requirement and be controlled using changing cavity.

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