Cyclic Relaxation Response Under Creep-Fatigue Conditions

2009 ◽  
pp. 182-182-25 ◽  
Author(s):  
JH Laflen ◽  
CE Jaske
Keyword(s):  
Relaxation Response ◽  
Creep Fatigue ◽  
Cyclic Relaxation

Creep-Fatigue Behavior in Ferritic-Martensitic Steels

2011 ◽  
Author(s):  
Meimei Li ◽  
Saurin Majumdar ◽  
Ken Natesan
Keyword(s):  
High Temperature ◽  
Stress Relaxation ◽  
Fatigue Behavior ◽  
Hold Time ◽  
Creep Damage ◽  
Cyclic Softening ◽  
Relaxation Response ◽  
Martensitic Steels ◽  
Softening Effect ◽  
Creep Fatigue

Ferritic-martensitic steels are the lead structural materials for next-generation nuclear energy systems. Due to increased operating temperatures required in advanced high-temperature reactor concepts, the high temperature performance of structural alloys and reliable high temperature structural design methodology have become increasingly urgent issues. Ferritic-martensitic steels experience significant cyclic softening at high temperatures, and this cyclic softening behavior affects consecutive stress relaxation response during hold time under creep-fatigue loading. It is found that the stress relaxation response during hold of the mod.9Cr-1Mo steel can be accurately described by a stress relaxation model. The creep damage associated with the stress relaxation during hold time can then be accurately calculated using the stress relaxation data and creep rupture data. It is shown that the unit creep damage per cycle in mod.9Cr-1Mo steel decreases considerably with increasing number of cycles due to cyclic softening, and the creep damage is sensitive to the initial stress of stress relaxation. Proper evaluation of the creep-fatigue damage in mod.9Cr-1Mo steel must consider the cyclic softening effect and its associated variations in creep damage from stress relaxation during the hold time.

Presentation of Humor and Facilitation of a Relaxation Response among Internal and External Scorers on Rotter's Scale

1993 ◽  
Vol 72 (3_suppl) ◽  
pp. 1248-1250 ◽  
Author(s):  
Frank J. Prerost
Keyword(s):  
Locus Of Control ◽  
Relaxation Response ◽  
Subsequent Measurement

40 men and 40 women categorized on the dimension of locus of control were measured for relaxation following exposure to humorous or nonhumorous stimuli. Internal scorers showed enhanced relaxation during subsequent measurement of biofeedback.

Generation of creep-fatigue interaction diagram for modified 9Cr–1Mo steel

2021 ◽  
Vol 191 ◽  
pp. 104376
Author(s):  
J. Veerababu ◽  
Sunil Goyal ◽  
J. Vanaja ◽  
A. Nagesha ◽  
M. Vasudevan
Keyword(s):  
Interaction Diagram ◽  
Creep Fatigue

Effect of thermal exposure on the strength and stress relaxation response of AA-7075-T6 material

2021 ◽  
pp. 124791
Author(s):  
M.Z. Butt ◽  
Samee Ullah ◽  
M. Rashid Khan ◽  
Sajjad Ahmad ◽  
Syed Zafar Ilyas
Keyword(s):  
Stress Relaxation ◽  
Thermal Exposure ◽  
Relaxation Response ◽  
Aa 7075
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