In creep conditions, conventionally, C* and C(t) line integrals are used for characterising the crack tip. However, the true crack driving force or its rate cannot be described by any of the conven...
{"title":"Creep crack growth characterization of SS316LN","authors":"Awanish Kumar Mishra, Avinash Gopalan, Ritesh Gupta, NaniBabu M., Karthik V., Abhishek Tiwari","doi":"10.1080/09603409.2023.2286811","DOIUrl":"https://doi.org/10.1080/09603409.2023.2286811","url":null,"abstract":"In creep conditions, conventionally, C* and C(t) line integrals are used for characterising the crack tip. However, the true crack driving force or its rate cannot be described by any of the conven...","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"66 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138546488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-25DOI: 10.1080/09603409.2023.2286799
Abhishek Tiwari, Awanish Kumar Mishra
{"title":"Crack driving forces under creep conditions in presence of material inhomogeneity","authors":"Abhishek Tiwari, Awanish Kumar Mishra","doi":"10.1080/09603409.2023.2286799","DOIUrl":"https://doi.org/10.1080/09603409.2023.2286799","url":null,"abstract":"","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"34 30","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-20DOI: 10.1080/09603409.2023.2283989
G. Chai, L. Lautrup, F. Gustavsson
Alleima 3R60TM is an AISI 316/316 L type of stainless steel. This alloy shows extra-long creep lives. At 700°C with an applied stress of 45 MPa, the specimen broke first after 240 131 hours, a 140%...
{"title":"Extra-long creep rupture life of Alleima 3R60TM (316/316L) stainless steel","authors":"G. Chai, L. Lautrup, F. Gustavsson","doi":"10.1080/09603409.2023.2283989","DOIUrl":"https://doi.org/10.1080/09603409.2023.2283989","url":null,"abstract":"Alleima 3R60TM is an AISI 316/316 L type of stainless steel. This alloy shows extra-long creep lives. At 700°C with an applied stress of 45 MPa, the specimen broke first after 240 131 hours, a 140%...","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"54 45 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-18DOI: 10.1080/09603409.2023.2283269
Vlastimil Vodárek, Zdeněk Kuboň, Renáta Palupčíková, Kryštof Hradečný, Petra Váňová
The paper deals with results of long-term stress rupture tests on “cross-weld“ specimens made of Super 304 H – P92 heterogeneous welds. Stress rupture tests were carried out at temperatures of 625°...
本文介绍了super304 H - P92非均质焊缝“交叉焊”试样的长期应力断裂试验结果。应力断裂试验在625°…
{"title":"Creep behaviour and microstructure evolution in Super 304H–P92 heterogeneous welds","authors":"Vlastimil Vodárek, Zdeněk Kuboň, Renáta Palupčíková, Kryštof Hradečný, Petra Váňová","doi":"10.1080/09603409.2023.2283269","DOIUrl":"https://doi.org/10.1080/09603409.2023.2283269","url":null,"abstract":"The paper deals with results of long-term stress rupture tests on “cross-weld“ specimens made of Super 304 H – P92 heterogeneous welds. Stress rupture tests were carried out at temperatures of 625°...","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"38 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-14DOI: 10.1080/09603409.2023.2281123
F. Riedlsperger, T. Wojcik, R. Buzolin, L. Witzmann, G. Zuderstorfer, B. Krenmayr, C. Sommitsch, B. Sonderegger
Solid solution strengthened (SSS) Ni-based superalloys, such as A617, show superior creep resistance at 700°C. Established for many years in land- and aero-based gas turbines, these materials are increasingly being considered for use in high-temperature thermal power plants. Apart from SSS, the creep strength in A617 stems from γ’ and carbide precipitates. In this work, a microstructurally based creep model for A617 is presented. Mobile dislocations in the model interact with fine grain-interior precipitates, and grain boundaries act as dislocation sources/sinks. The model is capable of simulating creep curves and time-to-rupture (TTR) diagrams based on the evolution of mobile dislocations. At lower stresses, the accuracy of modelled TTR can be improved by adding diffusion creep to dislocation creep. The simulated evolution of dislocation densities is realistic compared to the literature data. The reduction of area of ruptured samples was included in a damage factor, enabling the consideration of creep ductility.
{"title":"Recent progress in the microstructurally based creep modelling of Ni-based alloy 617","authors":"F. Riedlsperger, T. Wojcik, R. Buzolin, L. Witzmann, G. Zuderstorfer, B. Krenmayr, C. Sommitsch, B. Sonderegger","doi":"10.1080/09603409.2023.2281123","DOIUrl":"https://doi.org/10.1080/09603409.2023.2281123","url":null,"abstract":"Solid solution strengthened (SSS) Ni-based superalloys, such as A617, show superior creep resistance at 700°C. Established for many years in land- and aero-based gas turbines, these materials are increasingly being considered for use in high-temperature thermal power plants. Apart from SSS, the creep strength in A617 stems from γ’ and carbide precipitates. In this work, a microstructurally based creep model for A617 is presented. Mobile dislocations in the model interact with fine grain-interior precipitates, and grain boundaries act as dislocation sources/sinks. The model is capable of simulating creep curves and time-to-rupture (TTR) diagrams based on the evolution of mobile dislocations. At lower stresses, the accuracy of modelled TTR can be improved by adding diffusion creep to dislocation creep. The simulated evolution of dislocation densities is realistic compared to the literature data. The reduction of area of ruptured samples was included in a damage factor, enabling the consideration of creep ductility.","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"11 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134991241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-10DOI: 10.1080/09603409.2023.2281111
Jingwei Zhang, Zhicheng Li, Li Lin, Kanglin Liu
ABSTRACTThe high-temperature mechanical properties of 310S stainless steel were investigated by uniaxial tensile tests and small punch tests at the temperature from 20℃ to 600℃, and the relationship between the mechanical properties (σYS ,σUTS) and the characteristic loads (Fy, Fm) was established. The results revealed that with increasing temperature, the mechanical properties of 310S decrease, and the characteristic loads obtained by Fy_Mao, Fy_EN and Fy_E3205 are more appropriate for determining the yield strength of materials at high temperatures particularly for Fy_E3205. The fracture pattern observed in the SPT specimens indicated a mixed tough-brittle fracture accompanied by the characteristics of cleavage fracture. Additionally, the ultimate tensile strength of the material and the maximum load Fm increased slightly at 400 ℃ compared to 300 ℃ due to the precipitation of a large number of granular carbides and the increase in the grain size.KEYWORDS: 310s steelSmall punch testHigh temperatureMechanical propertiesFracture Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the National Natural Science Foundation of China (No.51705079), Natural Science Foundation of Fujian Province (No.2018J01767), Open Fund of Fujian Key Laboratory of Energy Measurement（Fujian Metrology Institute） (NYJL-KFKT-2022-02).
{"title":"High-temperature mechanical properties evaluation of 310S stainless steel","authors":"Jingwei Zhang, Zhicheng Li, Li Lin, Kanglin Liu","doi":"10.1080/09603409.2023.2281111","DOIUrl":"https://doi.org/10.1080/09603409.2023.2281111","url":null,"abstract":"ABSTRACTThe high-temperature mechanical properties of 310S stainless steel were investigated by uniaxial tensile tests and small punch tests at the temperature from 20℃ to 600℃, and the relationship between the mechanical properties (σYS ,σUTS) and the characteristic loads (Fy, Fm) was established. The results revealed that with increasing temperature, the mechanical properties of 310S decrease, and the characteristic loads obtained by Fy_Mao, Fy_EN and Fy_E3205 are more appropriate for determining the yield strength of materials at high temperatures particularly for Fy_E3205. The fracture pattern observed in the SPT specimens indicated a mixed tough-brittle fracture accompanied by the characteristics of cleavage fracture. Additionally, the ultimate tensile strength of the material and the maximum load Fm increased slightly at 400 ℃ compared to 300 ℃ due to the precipitation of a large number of granular carbides and the increase in the grain size.KEYWORDS: 310s steelSmall punch testHigh temperatureMechanical propertiesFracture Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the National Natural Science Foundation of China (No.51705079), Natural Science Foundation of Fujian Province (No.2018J01767), Open Fund of Fujian Key Laboratory of Energy Measurement（Fujian Metrology Institute） (NYJL-KFKT-2022-02).","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"113 33","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135137749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-09DOI: 10.1080/09603409.2023.2278833
K. Kettler, A. Klenk, S. Weihe
ABSTRACTThe design and operation of conventional power plant components is affected by load changes, with the balancing of renewable energy generation leading to an increase in warm and hot starts. Essential parts of these power plant components are flanges e.g. connecting pipes and turbine housings. While being structural rather simple, many influences affect the functionality of these flanges, like the high-temperature behaviour of the bolt material or the temperature distribution in the components. This paper presents parts of a recently finished research project on different influences on the relaxation behaviour of flanges. To investigate the influence of the bolt material, tests were carried out on a model of an IP turbine flange using martensitic X12CrMoWVNbN10-1-1 and nickel-based Ni80A bolts. Each tests included 2000 h of steady state and 3000 h of transient load with a retightening of the bolts after 1500 h. Exemplary relaxation tests on the X12 material provide additional information towards the observed behaviour in the flange tests.KEYWORDS: Stress relaxationcreepturbine flangetransient loadsretightening of boltscomponent testhigh temperature testing AcknowledgmentsThe presented results were obtained at MPA Stuttgart within a research project carried out in the industrial collective research programme (IGF No. 20088 N). It was supported by the Federal Ministry for Economic Affairs and Climate Action (BMWK) through the AiF (German Federation of Industrial Research Associations eV) based on a decision taken by the German Bundestag. The authors would also like to thank the research partners from the IfW Technical University of Darmstadt and the experts from member companies especially from GE Power GmbH, Siemens Energy Global GmbH & Co. KG und MAN Energy Solutions SE for their contributions in the project working group and the provision of various benefits in kind.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the AiF Projekt [20088 N].
{"title":"Experimental investigations on a model of a power plant flange under steady state and transient load","authors":"K. Kettler, A. Klenk, S. Weihe","doi":"10.1080/09603409.2023.2278833","DOIUrl":"https://doi.org/10.1080/09603409.2023.2278833","url":null,"abstract":"ABSTRACTThe design and operation of conventional power plant components is affected by load changes, with the balancing of renewable energy generation leading to an increase in warm and hot starts. Essential parts of these power plant components are flanges e.g. connecting pipes and turbine housings. While being structural rather simple, many influences affect the functionality of these flanges, like the high-temperature behaviour of the bolt material or the temperature distribution in the components. This paper presents parts of a recently finished research project on different influences on the relaxation behaviour of flanges. To investigate the influence of the bolt material, tests were carried out on a model of an IP turbine flange using martensitic X12CrMoWVNbN10-1-1 and nickel-based Ni80A bolts. Each tests included 2000 h of steady state and 3000 h of transient load with a retightening of the bolts after 1500 h. Exemplary relaxation tests on the X12 material provide additional information towards the observed behaviour in the flange tests.KEYWORDS: Stress relaxationcreepturbine flangetransient loadsretightening of boltscomponent testhigh temperature testing AcknowledgmentsThe presented results were obtained at MPA Stuttgart within a research project carried out in the industrial collective research programme (IGF No. 20088 N). It was supported by the Federal Ministry for Economic Affairs and Climate Action (BMWK) through the AiF (German Federation of Industrial Research Associations eV) based on a decision taken by the German Bundestag. The authors would also like to thank the research partners from the IfW Technical University of Darmstadt and the experts from member companies especially from GE Power GmbH, Siemens Energy Global GmbH & Co. KG und MAN Energy Solutions SE for their contributions in the project working group and the provision of various benefits in kind.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the AiF Projekt [20088 N].","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":" 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135290867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-09DOI: 10.1080/09603409.2023.2268334
M. Schwienheer, F. Kolzow
ABSTRACTFor the service life calculation of high-temperature components the knowledge of the creep behaviour of the materials used remain essential. Over decades, many methods have been developed for extrapolating creep rupture strengths. The challenge with these Creep Rupture Data Assessments (CRDAs), however, always remains evaluating the predictive accuracy of creep life. New computer-aided calculation methods allow the use of extensive data on the casts and other experimental data, as well as the application of probabilistic methods. Within the ECCC, software tools are being developed that both leverage the capabilities of new powerful computer-aided computational methods and allow for simultaneous assessment with post-assessment testing in accordance with ECCC recommendations. The authors would like to point out that despite all available tools and guidelines, the expertise and experience of the assessor is an indispensable guarantor for a reliable evaluation.KEYWORDS: Creepcreep rupture dataassessmentpost assessment testsmaximum likelihoodprobabilistic lifetime model AcknowledgmentsThe authors would like to thank the ECCC for its technical and financial support. “So long, and thanks for all the fish” [39].Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the ECCC European Creep Collaborative Committee.
{"title":"Creep rupture data assessment – new uncertain challenges require new uncertain answers","authors":"M. Schwienheer, F. Kolzow","doi":"10.1080/09603409.2023.2268334","DOIUrl":"https://doi.org/10.1080/09603409.2023.2268334","url":null,"abstract":"ABSTRACTFor the service life calculation of high-temperature components the knowledge of the creep behaviour of the materials used remain essential. Over decades, many methods have been developed for extrapolating creep rupture strengths. The challenge with these Creep Rupture Data Assessments (CRDAs), however, always remains evaluating the predictive accuracy of creep life. New computer-aided calculation methods allow the use of extensive data on the casts and other experimental data, as well as the application of probabilistic methods. Within the ECCC, software tools are being developed that both leverage the capabilities of new powerful computer-aided computational methods and allow for simultaneous assessment with post-assessment testing in accordance with ECCC recommendations. The authors would like to point out that despite all available tools and guidelines, the expertise and experience of the assessor is an indispensable guarantor for a reliable evaluation.KEYWORDS: Creepcreep rupture dataassessmentpost assessment testsmaximum likelihoodprobabilistic lifetime model AcknowledgmentsThe authors would like to thank the ECCC for its technical and financial support. “So long, and thanks for all the fish” [39].Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the ECCC European Creep Collaborative Committee.","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":" 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135291338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACTA practical procedure for predicting the remaining creep-rupture life of in-service boiler pipes under their operating conditions is proposed and discussed in this study. Tests were conducted on a coupon obtained using electric discharge sampling equipment from the outer surface of an in-service boiler pipe of modified 9Cr-1Mo steel. An ultra-miniature creep (UMC) specimen machined from the coupon was employed for the tensile creep test. Focusing on an iso–stress approach that has potential for the remaining life prediction using a limited test data, its suitability has been discussed. Test results indicate that the iso–stress approach can be applied to predict the remaining creep-rupture life using the UMC testing method with high accuracy. Furthermore, an examination of the high-temperature oxidation resistance of the UMC specimen indicated that oxidation had little influence on the rupture time.KEYWORDS: In-service pipingmodified 9Cr-1Mo steelremaining creep life predictionultra-miniature specimeniso–stress approachLarson–Miller parameterMonkman–Grant relationshiphigh-temperature oxidation Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Practical application of an ultra-miniature creep test to the remaining creep-rupture life prediction using an iso–stress approach for in-service boiler piping of modified 9Cr-1Mo steel","authors":"Hirohide Nakatsuka, Chiaki Hisaka, Kazukiyo Takahashi, Akito Nitta, Masatsugu Yaguchi","doi":"10.1080/09603409.2023.2278361","DOIUrl":"https://doi.org/10.1080/09603409.2023.2278361","url":null,"abstract":"ABSTRACTA practical procedure for predicting the remaining creep-rupture life of in-service boiler pipes under their operating conditions is proposed and discussed in this study. Tests were conducted on a coupon obtained using electric discharge sampling equipment from the outer surface of an in-service boiler pipe of modified 9Cr-1Mo steel. An ultra-miniature creep (UMC) specimen machined from the coupon was employed for the tensile creep test. Focusing on an iso–stress approach that has potential for the remaining life prediction using a limited test data, its suitability has been discussed. Test results indicate that the iso–stress approach can be applied to predict the remaining creep-rupture life using the UMC testing method with high accuracy. Furthermore, an examination of the high-temperature oxidation resistance of the UMC specimen indicated that oxidation had little influence on the rupture time.KEYWORDS: In-service pipingmodified 9Cr-1Mo steelremaining creep life predictionultra-miniature specimeniso–stress approachLarson–Miller parameterMonkman–Grant relationshiphigh-temperature oxidation Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACTC276 superalloy is considered as a potential structural material for advanced nuclear reactor with good mechanical properties and corrosion resistance. High-temperature creep behaviour of C276 alloy was investigated in the temperature range of 650°C–700°C and at stresses of 140–430 MPa. A linear relationship was fitted between stress and minimum creep rate in the logarithmic coordinate system. The rupture time is analysed for life prediction in terms of isotherm extrapolation method, Monkman–Grant relation, and Larson–Miller parameter method, respectively. The isochronous stress–strain curves as a means of representing stress–strain–time relations under creep conditions were established by the parameter method. The fracture surface morphology of ruptured specimens was characterised by a scanning electron microscope to elucidate the failure mechanism.KEYWORDS: Ni-Mo-Cr superalloycreep rupturelife predictionisochronous stress–strain curve AcknowledgmentsThis work was supported by the National Natural Science Foundation of China (Grant nos. 52071330, 51901241), the Research Project of Shanghai Science and Technology Commission (19DZ2200300), the National Key Research and Development Program (Grant no. 2021YFB3700605), the Young Potential Program of Shanghai Institute of Applied Physics, Chinese Academy of Sciences and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA02004210).Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the National Natural Science Foundation of China [52071330]; National Natural Science Foundation of China [51901241]; the Strategic Priority Research Program of the Chinese Academy of Sciences [XDA02004210]; Research Project of Shanghai Science and Technology Commission [19DZ2200300]; the National Key Research and Development Program [2021YFB3700605].
{"title":"Study on creep characteristics and the isochronous stress–strain curve of Ni-Cr-Mo superalloy","authors":"Guangcheng Fan, Guangzhou Yuan, Wanxia Wang, Songlin Wang, Jianxiong Zhang, Yanyan Jia, Jiamin Wang, Yanling Lu","doi":"10.1080/09603409.2023.2277565","DOIUrl":"https://doi.org/10.1080/09603409.2023.2277565","url":null,"abstract":"ABSTRACTC276 superalloy is considered as a potential structural material for advanced nuclear reactor with good mechanical properties and corrosion resistance. High-temperature creep behaviour of C276 alloy was investigated in the temperature range of 650°C–700°C and at stresses of 140–430 MPa. A linear relationship was fitted between stress and minimum creep rate in the logarithmic coordinate system. The rupture time is analysed for life prediction in terms of isotherm extrapolation method, Monkman–Grant relation, and Larson–Miller parameter method, respectively. The isochronous stress–strain curves as a means of representing stress–strain–time relations under creep conditions were established by the parameter method. The fracture surface morphology of ruptured specimens was characterised by a scanning electron microscope to elucidate the failure mechanism.KEYWORDS: Ni-Mo-Cr superalloycreep rupturelife predictionisochronous stress–strain curve AcknowledgmentsThis work was supported by the National Natural Science Foundation of China (Grant nos. 52071330, 51901241), the Research Project of Shanghai Science and Technology Commission (19DZ2200300), the National Key Research and Development Program (Grant no. 2021YFB3700605), the Young Potential Program of Shanghai Institute of Applied Physics, Chinese Academy of Sciences and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA02004210).Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the National Natural Science Foundation of China [52071330]; National Natural Science Foundation of China [51901241]; the Strategic Priority Research Program of the Chinese Academy of Sciences [XDA02004210]; Research Project of Shanghai Science and Technology Commission [19DZ2200300]; the National Key Research and Development Program [2021YFB3700605].","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"123 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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