{"title":"蠕变疲劳加载过程中的空化现象","authors":"R. Sandström","doi":"10.1080/09603409.2023.2188356","DOIUrl":null,"url":null,"abstract":"ABSTRACT Cavitation is expected to be of equal importance for assessing creep damage during cyclic as during static loading conditions. However, the amount of cavitation data is much more limited in the former case. In particular, two features have been missing: basic models for hysteresis loops and for the formation of cavities during cyclic loading. In this paper, such models are presented and compared with published data for LCF of 1Cr0.5Mo steel. To study the role of the creep–fatigue interaction, the influence of pre-creep as well as LCF cycles with and without hold times were included. Hysteresis loops under these conditions could be well reproduced. A model for nucleation of cavities during creep is adapted to cyclic loading. The total creep strain determined with the help of the loop model could be used to predict the number of cavities during the different LCF loops in an acceptable way.","PeriodicalId":49877,"journal":{"name":"Materials at High Temperatures","volume":"22 1","pages":"174 - 183"},"PeriodicalIF":1.0000,"publicationDate":"2023-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Cavitation during creep-fatigue loading\",\"authors\":\"R. Sandström\",\"doi\":\"10.1080/09603409.2023.2188356\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"ABSTRACT Cavitation is expected to be of equal importance for assessing creep damage during cyclic as during static loading conditions. However, the amount of cavitation data is much more limited in the former case. In particular, two features have been missing: basic models for hysteresis loops and for the formation of cavities during cyclic loading. In this paper, such models are presented and compared with published data for LCF of 1Cr0.5Mo steel. To study the role of the creep–fatigue interaction, the influence of pre-creep as well as LCF cycles with and without hold times were included. Hysteresis loops under these conditions could be well reproduced. A model for nucleation of cavities during creep is adapted to cyclic loading. The total creep strain determined with the help of the loop model could be used to predict the number of cavities during the different LCF loops in an acceptable way.\",\"PeriodicalId\":49877,\"journal\":{\"name\":\"Materials at High Temperatures\",\"volume\":\"22 1\",\"pages\":\"174 - 183\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2023-03-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials at High Temperatures\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1080/09603409.2023.2188356\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials at High Temperatures","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/09603409.2023.2188356","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
ABSTRACT Cavitation is expected to be of equal importance for assessing creep damage during cyclic as during static loading conditions. However, the amount of cavitation data is much more limited in the former case. In particular, two features have been missing: basic models for hysteresis loops and for the formation of cavities during cyclic loading. In this paper, such models are presented and compared with published data for LCF of 1Cr0.5Mo steel. To study the role of the creep–fatigue interaction, the influence of pre-creep as well as LCF cycles with and without hold times were included. Hysteresis loops under these conditions could be well reproduced. A model for nucleation of cavities during creep is adapted to cyclic loading. The total creep strain determined with the help of the loop model could be used to predict the number of cavities during the different LCF loops in an acceptable way.
期刊介绍：
Materials at High Temperatures welcomes contributions relating to high temperature applications in the energy generation, aerospace, chemical and process industries. The effects of high temperatures and extreme environments on the corrosion and oxidation, fatigue, creep, strength and wear of metallic alloys, ceramics, intermetallics, and refractory and composite materials relative to these industries are covered.
Papers on the modelling of behaviour and life prediction are also welcome, provided these are validated by experimental data and explicitly linked to actual or potential applications. Contributions addressing the needs of designers and engineers (e.g. standards and codes of practice) relative to the areas of interest of this journal also fall within the scope. The term ''high temperatures'' refers to the subsequent temperatures of application and not, for example, to those of processing itself.
Materials at High Temperatures publishes regular thematic issues on topics of current interest. Proposals for issues are welcomed; please contact one of the Editors with details.
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