Cavitation during creep-fatigue loading

IF 1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials at High Temperatures Pub Date : 2023-03-04 DOI:10.1080/09603409.2023.2188356

R. Sandström

引用次数: 1

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.

查看原文本刊更多论文

蠕变疲劳加载过程中的空化现象

空化对于评估循环载荷和静态载荷条件下的蠕变损伤同样重要。然而，在前一种情况下，空化数据的数量要有限得多。特别是缺少两个特征:滞回环的基本模型和循环加载过程中空洞形成的基本模型。本文提出了这些模型，并与已发表的1Cr0.5Mo钢LCF数据进行了比较。为了研究蠕变-疲劳相互作用的作用，考虑了预蠕变以及有和没有保持时间的LCF循环的影响。在这些条件下可以很好地再现迟滞回线。蠕变过程中空洞成核的模型适用于循环加载。利用环模型确定的总蠕变应变可以较好地预测不同环段的空腔数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials at High Temperatures 工程技术-材料科学：综合

CiteScore

1.90

自引率

15.40%

发文量

审稿时长

>12 weeks

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.