Effects of deformation (strain) and heat treatment on grain boundary sensitization and precipitation in austenitic stainless steels

Journal Article · Thu Mar 01 00:00:00 EST 1990 · Materials Characterization; (USA)

DOI:https://doi.org/10.1016/1044-5803(90)90032-F· OSTI ID:6902680

Murr, L E ^[1]; Advani, A; Shankar, S; Atteridge, D G ^[2]

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1. Texas Univ., El Paso, TX (USA)
2. Oregon Graduate Center, Beaverton, OR (USA). Dept. of Materials Science and Engineering

Sensitization, particularly the degree of sensitization (DOS) in type 316 stainless steel pipe is critically dependent upon the solution anneal of the mill-annealed or commercial material, and is particularly sensitive to los-temperature aging when the starting material is solution annealed between about 1,000{degrees}C and 1,100{degrees}C. It is observed that when the DOS is above about 10 C/cm{sup 2} (quantitative electrochemical photentiokinetic reactivation units in Coulombs/cm{sup 2}), noticeable carbide precipitation occurs in the grain boundaries and increases with increasing DOS. Transmission electron microscopy (TEM) examination of precipitation occurring in type 316 stainless steel pipe grain boundaries has shown them to exhibit many microstructural features that seem to be coincident with grain boundary microstructures, particularly ledges.

• OSTI ID: 6902680
• Journal Information: Materials Characterization; (USA), Vol. 24:2; ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
AUSTENITIC STEELS
GRAIN BOUNDARIES
STAINLESS STEEL-316
PIPELINES
CRACKING
DEFORMATION
ELECTROCHEMICAL CORROSION
HEAT TREATMENTS
TRANSMISSION ELECTRON MICROSCOPY
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CHROMIUM-NICKEL-MOLYBDENUM STEELS
CORROSION
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
DECOMPOSITION
ELECTRON MICROSCOPY
HEAT RESIS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MICROSCOPY
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PYROLYSIS
STAINLESS STEELS
STEEL-CR17NI12MO3
STEELS
THERMOCHEMICAL PROCESSES
360102* - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties
360105 - Metals & Alloys- Corrosion & Erosion
420205 - Engineering- Transport & Storage Facilities- (1980-)