Metallographic study of type 304 stainless steel: long-term creep-rupture specimen. [595/sup 0/C]

Technical Report · Thu Jan 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6701445· OSTI ID:6701445

Biss, V. A.; Sikka, V. K.

Microstructural analyses were performed on a type of 304 stainless steel creep-rupture specimen that exhibited a 59,900-h rupture life at 595/sup 0/C and 117 MPa. The long-term creep-rupture exposure was accompanied by precipitation of Cr/sub 23/C/sub 6/ in the matrix and along the grain boundaries and iron-chromium type sigma phase along the grain boundaries. Stress-induced local grain boundary migration was evident and was associated with simultaneous dissolution of carbide particles and formation of sigma phase along the migrating boundary. In small isolated locations, austenite transoformed to ferrite.

• Research Organization: Climax Molybdenum Co. of Michigan, Ann Arbor (USA); Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6701445
• Report Number(s): ORNL/TM-7618
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
CRYSTAL STRUCTURE
FAILURES
GRAIN BOUNDARIES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH TEMPERATURE
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
METALLOGRAPHY
MICROSTRUCTURE
NICKEL ALLOYS
RUPTURES
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
TESTING