Effect of heat treatment on grain boundary chemistry and fracture properties of a V-5Cr-5Ti alloy

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00345-V· OSTI ID:237827

Li, H ^[1]; Hamilton, M L; Jones, R H ^[2]

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1. Associated Western Universities-Northwest Division, Richland, WA (United States)
2. Pacific Northwest Lab., Richland, WA (United States)

A vanadium-based alloy with 5%(wt) Cr and 5%(wt) Ti (V-5Cr-5Ti) is being considered as a candidate structural material for a fusion energy system. Besides retaining its good strength and ductility at both ambient and elevated temperatures, vanadium-based alloys possess some unique neutronic properties as compared to austenitic and ferritic steels. Low neutron activation in the short-term, and especially in intermediate and long terms, and low biological hazard potential are particularly attractive properties of vanadium alloys. However, the alloy was found to be brittle at room temperature (RT) and experienced mixed intergranular and cleavage fracture when annealed at 1,125 C for 1 h and furnace cooled. It has been known that S segregation to grain boundaries can induce intergranular fracture in iron and nickel-based alloys. This study was designed to investigate systematically the effect of grain boundary chemistry on the fracture properties of the alloy.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 237827
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 7 Vol. 33; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AUGER ELECTRON SPECTROSCOPY
BRITTLENESS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
FRACTURE PROPERTIES
FRACTURES
GRAIN BOUNDARIES
HEAT TREATMENTS
MATERIALS
SEGREGATION
SULFUR
THERMONUCLEAR POWER PLANTS
TITANIUM ALLOYS
VANADIUM ALLOYS
VOIDS