FIZIKA A 10 (2001) 2 , 73-86

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EFFECT OF TEMPERATURE AND INDIUM ADDITION ON THE WORK HARDENING CHARACTERISTICS OF Al-0.21wt%Au ALLOY

F. ABD EL-SALAM, A. M. ABD EL-KHALEK and R. H. NADA

Physics Department, Faculty of Education, Ain Shams University, Cairo, Egypt

Received 27 November 2000; revised manuscript received 23 April 2001
Accepted 25 June 2001

Tensile characteristics of both Al-0.21wt%Au and Al-0.21wt%Au-0.21wt%In alloys were investigated in the temperature range 493 K to 553 K. The coefficient of work hardening, c = s2/e, yield stress, sy, and fracture stress, sf, decreased with increasing deformation temperature (T) and exhibited abrupt increase at about 523 K. On the other hand, the fracture strain, ef, and dislocation slip distance, L, increased with increasing deformation temperature and exhibited minima at about 523 K. The activation energy was determined in the range around 523 K to clarify the observed change in the behaviour of the hardening characteristics of the investigated samples.

PACS numbers: 62.20.-x, 83.50.Nj
UDC 531.4-522, 531.431.42
Keywords: stress-strain, deformation temperature, dislocations, hardening characteristics, softening, incoherent precipitates
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