STRUCTURAL TRANSFORMATIONS IN Al-Cu COMPOSITE

 I. S. Los', A. V. Khorin, G. V. Kozlov,

and A. V. Pryshchak 

Penza State University

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

Analysis of the Al-Cu composite properties with

intermetallic hardening obtained as a result of

complex technology.

2

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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Explosive welding

Rolling

Heat treatment

Micro arc oxidation

Finished material

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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Form fibers : d – fiber diameter;

h – strip height; a – strip width

1 – explosive; 2, 4 – matrix plates; 3 – Cu filaments; γ – angle of

impact; D – direction of detonation; V – impact velocity; Vк – contact

point velocity; k1 – gap between matrix plates

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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t = 22,7 µs

t = 10,7 µs t = 12,1 µs

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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×5 ×100

macrostructure in cross-section

dedicated fragment

microstructure

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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25 % ×100 50 % ×100

93 % ×150

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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1 – aluminum matrix; 2 – phase CuAl2; 3 – phase CuAl; 4 – copper fiber

X-ray spectrum phase CuAl2

X-ray spectrum phase CuAl

phase CuAl2 9,5 … 10,5 GPa phase CuAl 6,0…7,5 GPa

× 200

× 200

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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The volume of intermetallic

phases, %

Mechanical property

Tensile strength, GPa

Modulus of elasticity,

GPa

Elongation, %

Specific strength, km

Specific modulus of elasticity,

103 km

0,5 175,6…178,65 75,86…77,09 21,0…22,5 6,38…6,50 2,76…2,80

2,5 193,2…199,6 79,59…81,06 20,7…22,4 7,02…7,25 2,89…2,95

5,0 208,93…212,3 82,6…83,68 20,2…22,1 7,59…7,71 3,0…3,04

9,0 232,05…233,15 80,95…82,32 19,3…21,0 8,43…8,47 2,94…2,99

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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Tensile strength, GPa

Modulus of elasticity, GPa

Specific strength, km

Specific modulus of elasticity,103 km

1 – AlMg2; 2 – Composite after heat treatment; 3 – Composite after heat treatment and micro arc oxidation technology

1 2 3

1 2 3

1 2 3

1 2 3

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

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X-ray spectral analysis had following result: phase side with

copper consists of CuAl predominately and phase side with

aluminum consists of CuAl2 predominately.

The interdiffusion coefficient activation energy of CuAl was

150,3 kJ/mol, CuAl2 - 96,3 kJ/mol.

Aluminum-copper intermetallic composite has high mechanical property and handling ability.

Complex technology is protected by patent.

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)

Thank you Thank you

for attention!for attention!

E-mail: metal@pnzgu.ruE-mail: metal@pnzgu.ru

Phone/fax: Phone/fax: ++77 84128412 3636 8484 535312

XII International Symposium on Explosive Production of New Materials: Science, Technology, Business, and Innovations (EPNM-2014)