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23992

HIGH TEMPERATURE DEFORMATION BEHAVIOR OF Al-SiCp METAL MATRIX COMPOSITES

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Last updated: 04 Jan 2025

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Abstract

Aluminum-silicon carbide (Al-SiCp) metal matrix composite (MMC) materials were fabricated using the powder metallurgy (PM) techniques of hot compaction followed by hot extrusion. Different reinforcement weight fractions were used, i.e. 0, 2.5, 5, and 10 wt% SiCp. Hot tensile deformation tests were used to characterize the ductility deformation and strength at different temperatures, i.e. T = 0.3 Tm, 0.4 Tm, 0.5 Tm, and 0.6 Tm (where Tm is the absolute melting point of the matrix material), and at different strain rates, i.e. ε• = 2 x10-3 s-1, and 0.6 Tm 100x 10-3 s-1. Brief microscopic examination was used to support the analysis of results. It was found that the stress-strain behavior is dominated by work-hardening at the lower temperature range. The work-hardening exponent (n) decreased as T increased and as reinforcement weight fraction increased but increased as ε• increased. As reinforcement weight fraction increased, considerable strengthening was achieved compared to the unreinforced matrix. The reinforcement particles dominated the plastic flow and reduced the effect of high temperature in reducing the flow stress. However, as reinforcement weight fraction increased, the tensile strength σu, as well as the yieled strength, σy were negatively affected specially at high deformation temperatures and at high strain rates. σu was found to be more negatively affected than σy. σy and σu of the unreinforced material increased as ε• increased, for all tested temperatures. As reinforcement particles were introduced to the matrix, the two parameters increased with strain rate up to ε• = 50 x 10-3 s-1, then decreased as ε• = 100 x 10-3 S-1. Maximum reduction in σy was obtained at T = 0.4 Tm at ε• = 100 x 10-3 s-1. Ductility expressed by the strain to facture, εf, decreased with the increase in ε•, for all investigated materials. Minimum εf was obtained for Al-10 wt% SiCp as T = 0.4 tm and ε• = 100 x 10-3 s-1 was applied.

DOI

10.21608/asat.2007.23992

Keywords

Metal matrix composites-powder metallurgy-tensile deformation-ductility-strengrth

Authors

First Name

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Last Name

Mazen

MiddleName

A.

Affiliation

Associate Professor, El-Menia University.

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Orcid

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First Name

M.

Last Name

Emara

MiddleName

M.

Affiliation

Research Associate.

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Volume

12

Article Issue

ASAT Conference, 29-31 May 2007

Related Issue

4431

Issue Date

2007-05-01

Receive Date

2019-01-09

Publish Date

2007-05-01

Page Start

1

Page End

13

Print ISSN

2090-0678

Online ISSN

2636-364X

Link

https://asat.journals.ekb.eg/article_23992.html

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https://asat.journals.ekb.eg/service?article_code=23992

Order

70

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

HIGH TEMPERATURE DEFORMATION BEHAVIOR OF Al-SiCp METAL MATRIX COMPOSITES

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Article

Created At

22 Jan 2023