Effect of aging and cold working on the high-temperature low-cycle fatigue behavior of alloy 800H: Part II continuous cyclic loading. [Aging 4000 and 8000 hr at 538 to 760/sup 0/C]
The individual and combined effects of cold working (5 and 10 pct) and aging (4000 and 8000 h in the temperature range 538 to 760/sup 0/C) on the high-temperature low-cycle fatigue behavior of alloy 800H have been investigated. The specimens were tested at the aging temperatures. Both the saturation stress range and the fatigue life were found to be history dependent. A history-independent hardening mechanism, dynamic strain aging, was found to operate over the temperature range approx. 450 to 650/sup 0/C and to be maximized at approx. 550/sup 0/C. It is speculated that carbon is responsible for this dynamic strain aging. Finally, at temperatures above 538/sup 0/C the Coffin-Manson plots indicate the possible existence of a history-independent softening mechanism.
- Research Organization:
- General Atomic Co., San Diego, CA (USA); Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AT03-76ET35300
- OSTI ID:
- 5848951
- Report Number(s):
- GA-A-15558
- Country of Publication:
- United States
- Language:
- English
Similar Records
Aging behavior of alloy 800H and associated mechanical property changes. [538/sup 0/ to 816/sup 0/C]
Effect of aging and cold working on the high-temperature low-cycle fatigue behavior of alloy 800H. Part I. The effect of hardening processes on the initial stress--strain curve
Investigation of the thermal stability of a commercial Ni--Cr--Fe--Mo alloy (Hastelloy Alloy X). [538 to 871/sup 0/C]
Technical Report
·
Tue Oct 31 23:00:00 EST 1978
·
OSTI ID:6061464
Effect of aging and cold working on the high-temperature low-cycle fatigue behavior of alloy 800H. Part I. The effect of hardening processes on the initial stress--strain curve
Journal Article
·
Sat Jul 01 00:00:00 EDT 1978
· Metall. Trans., A; (United States)
·
OSTI ID:6466179
Investigation of the thermal stability of a commercial Ni--Cr--Fe--Mo alloy (Hastelloy Alloy X). [538 to 871/sup 0/C]
Journal Article
·
Thu Jun 01 00:00:00 EDT 1978
· Metall. Trans., A; (United States)
·
OSTI ID:6428258
Related Subjects
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
AGING
ALLOYS
ANNEALING
CARBIDES
CARBON COMPOUNDS
CHROMIUM ALLOYS
COLD WORKING
CRACKS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
FABRICATION
FATIGUE
HARDENING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
HIGH TEMPERATURE
INCOLOY 800
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
LINE DEFECTS
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
PRECIPITATION
SEPARATION PROCESSES
STRAIN AGING
THERMAL CYCLING
YIELD STRENGTH
360103* -- Metals & Alloys-- Mechanical Properties
AGING
ALLOYS
ANNEALING
CARBIDES
CARBON COMPOUNDS
CHROMIUM ALLOYS
COLD WORKING
CRACKS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
FABRICATION
FATIGUE
HARDENING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
HIGH TEMPERATURE
INCOLOY 800
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
LINE DEFECTS
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
PRECIPITATION
SEPARATION PROCESSES
STRAIN AGING
THERMAL CYCLING
YIELD STRENGTH