Abnormal creep behavior of ferritic Fe-24Cr-4Al stainless steel

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90235-6· OSTI ID:7045490

Tjong, S C; Zhang, J S ^[1]

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1. City Polytechnic of Hong Kong, Kowloon (Hong Kong). Dept. of Physics and Materials Science

There are several potential advantages in using ferritic Fe-Cr-Al alloys in high temperature applications, i.e. lower raw materials costs, superior oxidation resistance, and lower coefficient of thermal expansion than the Ni-base superalloys. In view of these conditions, ferritic Fe-Cr-Al alloys find some applications in high temperature oxidation environment such as heating elements, nuclear reactors, petroleum refineries and automotive exhaust system. The cyclic deformation behavior of this alloy has been investigated previously. It was found that the labyrinth structures that are typical substructures developed in fatigued f.c.c. metals also tend to form in this ferritic alloy. The presence of persistent slip bands (PSBs) in the ferritic alloy would drastically reduce its fatigue life. This investigation has been principally aimed to establish the parameters necessary for predicting the high temperature creep behavior of Fe-24Cr-4Al alloy. The addition of Al to Fe-24Cr alloy for enhancement of the oxidation resistance can lead to abnormal creep behavior.

• OSTI ID: 7045490
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:11; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CORROSION RESISTANCE
CREEP
DATA
ELEMENTS
EXPERIMENTAL DATA
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
NUMERICAL DATA
STAINLESS STEELS
STEELS