ABSTRACT
A R Jones Department of Engineering, The University of Liverpool, Liverpool, L69 3GH
Abstract. In this work, development of porosity in an iron based oxide dispersion strengthened (ODS) alloy, PM2000, has been examined by scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Pores about 1 OJ.Lm in size were found in a sample that had undergone recrystallisation annealing at 1380°C for 1hour. However, the size of the pores increased to about lOOJ.Lm when the sample was annealed at 1380°C for 2200 hours. EPMA results showed that the AI content in the 1 hour annealed sample was 4.50% but this fell to 3.35% after the long anneal. Based on these results, it has been suggested that some of the pores observed in the ODS alloy may be Kirkendall pores due to the loss of AI. In addition, SEM results have identified that two types of pore are present, one of which is part-filled.
