Relationship Between Small-punch Creep Test Data and Uniaxial Creep Test Data based on the Monkman–Grant Relation

Bum Joon Kim; Ilseon Sohn; Byeong Soo Lim

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Korean Society for Precision Engineering
Journal of the Korean Society for Precision Engineering 학술저널
한국정밀공학회지 Vol.30 No.8
2013.8 809 - 814 (6page)

저자정보

Bum Joon Kim (Osan Univ.)
Ilseon Sohn (Osan Univ.)
Byeong Soo Lim (Sungkyunkwan Univ.)

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The relationship between the small-punch creep test and the conventional creep test was investigated experimentally using a method similar to that of the Monkman?Grant relationship. Uniaxial and small-punch creep rupture tests were carried out on 9Cr-2W ferritic steel(Commercial Grade 92 steel: X10CrWMoVNb 9-2) at elevated temperatures. From the relation derived in the same manner as the Monkman?Grant relation, a correlation between the displacement rate in response to the small-punch creep test and the strain rate in the uniaxial creep test was found, and the creep life was calculated using this relation. Furthermore, the failure modes of the small punch creep test specimens were investigated to show that the fracture was caused by creep.

#Uniaxial creep (일축 크리프) #Small-punch creep (소형펀치 크리프) #Monkman–Grant relation (몽크만-그랜트관계) #Minimum creep rate (최소크리프 속도)