Effect of aging on properties of pressure vessel steels
Creators
- 1. Materials Physics and Metallurgy Div., AERE Harwell, Oxon OX11 0RA (UK)
Description
Manganese-molybdenum-nickel steels are used in nuclear pressure vessels operating at temperatures up to 3500C. The effects of thermal ageing in the temperature range 300-5500C for durations up to 2 x 104 h have been studied in conventionally quenched and tempered and simulated heat-affected-zone (HAZ) microstructural conditions. Quantitative fractography and Auger spectroscopy have been used to relate changes in mechanical properties with changes in fracture mode and grain boundary chemistry. Aging increases the ductile-brittle transition temperature by an amount dependent on material, prior heat treatment, aging temperature and time. Embrittlement is associated with segregation of phosphorus to grain boundaries and is modelled using McLean's approach to equilibrium segregation
Additional details
Publishing Information
- Journal Title
- Acta Metall.
- Journal Volume
- 34
- Journal Issue
- 4
- Series
- Acta Metall.
- Journal Page Range
- 641-652
- ISSN
- 0001-6160
- CODEN
- AMETA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19081894
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Descriptors DEI
- AGING; AUGER ELECTRON SPECTROSCOPY; DUCTILE-BRITTLE TRANSITIONS; FRACTOGRAPHY; FRACTURE MECHANICS; FRACTURE PROPERTIES; HEAT TREATMENTS; HIGH TEMPERATURE; MANGANESE ALLOYS; MATHEMATICAL MODELS; MOLYBDENUM ALLOYS; NICKEL ALLOYS; PHYSICAL METALLURGY; REACTOR OPERATION; REACTOR SAFETY; REACTOR VESSELS; STEELS; STRUCTURAL CHEMICAL ANALYSIS; TERNARY ALLOY SYSTEMS; THERMAL FATIGUE
- Descriptors DEC
- ALLOY SYSTEMS; ALLOYS; CARBON ADDITIONS; CONTAINERS; ELECTRON SPECTROSCOPY; FATIGUE; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; MECHANICS; METALLURGY; OPERATION; SAFETY; SPECTROSCOPY