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EFFECT OF THERMO-MECHANICHAL TREATMENTS ON THE MECHANICAL BEHAVIOUR OF AL-Cu AND AL-Mg-Si ALLOYS

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Last updated: 24 Dec 2024

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Abstract

This investigation was carried out on two heat treatable aluminum alloys type-2014 (Al-Cu) and type-6082 (Al-Mg-Si) in order to evaluate their mechanical response against cold plastic strain either prior to or between the stages of aging. Standard flat specimens of the first alloy having a thickness of 3 mm were solution treated at 500°C for 1 hr followed by quenching in water then immediately subjected to different percentages of cold plastic strain either prior to, or/and between the stages of a double aging cycle. The first aging stage was carried out at 140°C for 55 hrs while the second one at 170°C for 5 hrs. The specimens of the second alloy having the same thickness were also solution treated at a higher temperature of 535°C for 1 hr and was also subjected to the same type of thermo-mechanical cycles, where aging of the first stage was done at 100°C for 15 hrs and at 180°C for 5 hrs in the second stage. The obtained results showed that, the application of 10% plastic strain prior to aging conjointly with 12% plastic working between the stages of double aging provide the utmost hardening effect to the Al-Cu alloy type-2014 by nearly doubling its strength. Moreover, the Al-alloy type-6082 showed a lower response to hardening compared with the Al-alloy type-2014. The application of 10% cold plastic strain prior to aging conjointly with 5% cold plastic strain between the stages of double aging increases the proof strength by 80% and decreases the ductility only by about 27%.

DOI

10.21608/asat.1999.25090

Keywords

Plastic strain, Solution treated, Thermo-mechanical treatment, aging

Authors

First Name

M.

Last Name

OSMAN

MiddleName

M.

Affiliation

Assistant Lecturer, dep. of materials science and technology, MTC.

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First Name

A.

Last Name

EL-MAHALLAWY

MiddleName

M.

Affiliation

Dr. materials science and technology dpt., MTC.

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City

-

Orcid

-

First Name

M.

Last Name

SALLAM

MiddleName

T.

Affiliation

Prof. materials science and technology dpt., MTC.

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City

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Orcid

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Volume

8

Article Issue

ASAT Conference, 4-6 May 1999

Related Issue

4551

Issue Date

1999-05-01

Receive Date

2019-01-17

Publish Date

1999-05-01

Page Start

1

Page End

12

Print ISSN

2090-0678

Online ISSN

2636-364X

Link

https://asat.journals.ekb.eg/article_25090.html

Detail API

https://asat.journals.ekb.eg/service?article_code=25090

Order

38

Type

Original Article

Type Code

737

Publication Type

Journal

Publication Title

International Conference on Aerospace Sciences and Aviation Technology

Publication Link

https://asat.journals.ekb.eg/

MainTitle

EFFECT OF THERMO-MECHANICHAL TREATMENTS ON THE MECHANICAL BEHAVIOUR OF AL-Cu AND AL-Mg-Si ALLOYS

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Article

Created At

22 Jan 2023