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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.11
- 수록면
- 4,408 - 4,417 (10page)
- DOI
- 10.1007/s12540-021-00988-7
이용수
초록· 키워드
오류제보하기
A study for evaluating the weld joint strength reduction factor (WSRF) due to creep was conducted for alloy 740H-P92 dissimilarmetal weld joint to be used advanced ultra-supercritical fossil power plants. To this end, a series of the creep rupturetests were carried out for P92 and alloy 740H parent metals and alloy 740H-P92 dissimilar metal weld joint at elevatedtemperatures ranging from 600 to 700 °C. Additionally, for the creep tested specimens, hardness measurement and microstructureobservation were performed. Weldment creep rupture test used specimens of transverse cross-weld type. In the creeptest result, weldment creep rupture strength was almost same as that of the P92 parent metal when analyzed as a function ofLarson-Miller parameter (LMP). However, when analyzed as a function of creep rupture time for individual temperatures,it showed a tendency to be lower than that of the P92 parent metal after certain times. The difference between two creepstrengths increased with increasing time. Based on the analysis result for creep rupture time at each temperature, the WSRFfor 100,000 h creep life was determined as 0.84 at 600 °C, 0.72 at 650 °C and 0.58 at 700 °C through extrapolation. Additionally,from the results of investigation on hardness and microstructure, it was shown that the creep life of alloy 740H-P92dissimilar metal weld joint was dominantly determined by the characteristics of the heat affected zone (HAZ) on P92 side.
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참고문헌 (27)
참고문헌 신청
N. Saito / 2015 / Mitsubishi Heavy Ind. Tech. Rev 52:27
W. G. Seo / 2020 / Mater. Charact 160:110083
Y. Yuan / 2015 / Tensile and Creep Deformation of a Newly Developed Ni-Fe-Based Superalloy for 700 °C Advanced Ultra-Supercritical Boiler Applications / Metals and Materials International 21(4):659~665
Seen Chan Kim / 2019 / Short‑Term Creep Data Based Long‑Term Creep Life Predictability for Grade 92 Steels and Its Microstructural Basis / Metals and Materials International 25(3):713~722
Javier Vivas / 2019 / Microstructural Degradation and Creep Fracture Behavior of Conventionally and Thermomechanically Treated 9% Chromium Heat Resistant Steel / Metals and Materials International 25(2):343~352
W. G. Seo / 2020 / Mater. Charact 160:110083
Y. Yuan / 2015 / Tensile and Creep Deformation of a Newly Developed Ni-Fe-Based Superalloy for 700 °C Advanced Ultra-Supercritical Boiler Applications / Metals and Materials International 21(4):659~665
Seen Chan Kim / 2019 / Short‑Term Creep Data Based Long‑Term Creep Life Predictability for Grade 92 Steels and Its Microstructural Basis / Metals and Materials International 25(3):713~722
Javier Vivas / 2019 / Microstructural Degradation and Creep Fracture Behavior of Conventionally and Thermomechanically Treated 9% Chromium Heat Resistant Steel / Metals and Materials International 25(2):343~352
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