Influence of Annealing at 1 100 deg C and 475 deg C on the Mechanical Properties at Room Temperature of an Iron Base ODS Alloy

• Published in: ISIJ international Vol. 47; no. 8; pp. 1214 - 1220
• Main Authors: Chao, Jesus, Gonzalez-Carrasco, Jose L, Capdevila, Carlos
• Format: Journal Article
• Language: English
• Published: 01.01.2007
• ISSN: 0915-1559

In the last few years the Fe-base oxide dispersion strengthened (ODS) PM 2000 alloy has been shown to be a biomaterial for its outstanding combination of mechanical properties and corros deg C (pre-oxidation) and low temperature annealing at 475 deg C on the main mechanical properties at room temperature, with particular emphasis on tensile and fatigue properties, which are suitable for achieving the required biofunctionality of load bearing implants. It has been shown that annealing at 475 deg C is responsible for an increase in the YS and UTS with the subsequent decrease in ductility. However, despite of the loss of ductility, the material shows ductile behaviour as is observed in the necked zone of tensile specimens, which contrasts with the so-called '475 deg C embrittlement' observed for another ferritic alloys. Moreover, aged material at 475 deg C exhibits a better fatigue limit than that non aged pre-oxidised material.