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Positron lifetime and coincidence Doppler broadening (CDBS) measurements were made on samples of Ti-6Al-4V alloy subjected to different mechanical and thermal treatments. The results indicated the presence of point defects in moderate concentrations. The as-received sample was initially heat treated at 1343K for 30minutes and slow-cooled to extract reference values. Even when subjected to heat treatment...
Phase decomposition in Al–6Mg alloy doped with Sc up to 0.6wt.% was first investigated through positron lifetime and coincidence Doppler broadening spectroscopic (CDBS) measurements. The results varied significantly with the degrees of doping and heat treatment conditions due to the entrapment and annihilation of positrons at vacancies and lattice irregularities like coherent and semi-coherent precipitate-matrix...
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