Izvorni znanstveni članak
Effect of temperature and indium addition on the work hardening characteristics of Al-0.21wt%Au alloy
F. Abd El-Salam
; Physics Department, Faculty of Education, Ain Shams University, Cairo, Egypt
A. M. El-Khalek
; Physics Department, Faculty of Education, Ain Shams University, Cairo, Egypt
R. H. Nada
; Physics Department, Faculty of Education, Ain Shams University, Cairo, Egypt
Sažetak
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, χ = ∂σ2/∂², yield stress, σy, and fracture stress, σf , decreased with increasing deformation temperature (T) and exhibited abrupt increase at about 523 K. On the other hand, the fracture strain, ²f , 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.
Ključne riječi
stress-strain; deformation temperature; dislocations; hardening characteristics; softening; incoherent precipitates
Hrčak ID:
301100
URI
Datum izdavanja:
1.7.2001.
Posjeta: 182 *