Metastable equilibrium of ferrite in type 308 stainless steel

Journal Article · Mon Dec 31 23:00:00 EST 1984 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(85)90258-3· OSTI ID:6350974

Vitek, J M; David, S A

The stability of type 308 stainless steel weld filler metal following elevated temperature aging has been the subject of an extensive research effort at Oak Ridge National Laboratory (ORNL). These studies on both homogenized and welded materials have shown that the ferrite phase transforms to austenite and sigma phase and no residual ferrite is expected in equilibrium in the temperature range of 550 to 850/sup 0/C. However, the transformation to sigma is very sluggish, with some residual ferrite often present after aging times of 1000 h or more. As an offshoot of the aging studies, the composition of ferrite has been evaluated as a function of aging time and temperature and these results and their interpretation are the focus of this paper.

• Research Organization: Metals and Ceramics Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
• OSTI ID: 6350974
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 19:1; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
AGING
ALLOYS
BORON ADDITIONS
BORON ALLOYS
CARBON ADDITIONS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
EQUILIBRIUM
FERRITE
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
METALLURGICAL EFFECTS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
STABILITY
STAINLESS STEEL-308
STAINLESS STEELS
STEELS
THERMAL DEGRADATION
THERMODYNAMIC PROPERTIES
TITANIUM ADDITIONS
TITANIUM ALLOYS
WELDED JOINTS