应变范围和保温时间对G17CrMoV5-10铸合金钢高温疲劳寿命的影响

Q4 Engineering

Fatigue of Aircraft Structures Pub Date : 2023-02-13 DOI:10.2478/fas-2022-0001

Anna Polnik, H. Matysiak, Sławomir Czarnewicz, Z. Pakieła

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引用次数: 0

摘要

本文对铸钢G17CrMoV5-10进行了研究。作为本研究的一部分，接受调查的材料通常用于制造汽轮机机壳。现代蒸汽轮机在高温和复杂的振荡负载下运行。因此，本研究的重点是研究材料在500°C下的低周疲劳（LCF）试验性能下的行为，包括和不包括拉伸保持时间。在所有类型的试验中，都注意到铸钢的循环软化。总应变速率的增加和保持时间的应用显著降低了疲劳寿命。在保持时间内，由于温度和张力，材料蠕变，这是通过增加非弹性应变调节来证实的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Effect of Strain Range and Hold Time on High Temperature Fatigue Life of G17CrMoV5-10 Cast Alloy Steel

Abstract In this work, cast steel G17CrMoV5-10 was investigated. The material subject to investigation as part of this study is commonly used to manufacture steam turbine casings. Modern steam turbines operate under elevated temperature and complex oscillated loads. Thus, the focus of this study was to investigate material under behavior during low cycle fatigue (LCF) test performance at 500°C with and without hold time in tension. During all types of test, cyclic softening of cast steel was noticed. Increasing of total strain rate and applying hold time significantly reduce fatigue life. During hold time, due to temperature and tension the material creep what is confirmed by increasing inelastic stain accommodation.

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来源期刊

Fatigue of Aircraft Structures Engineering-Safety, Risk, Reliability and Quality

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The publication focuses on problems of aeronautical fatigue and structural integrity. The preferred topics include: full-scale fatigue testing of aircraft and aircraft structural components, fatigue of materials and structures, advanced materials and innovative structural concepts, damage tolerant design of aircraft structure, life extension and management of ageing fleets, structural health monitoring and loads, fatigue crack growth and life prediction methods, NDT inspections, airworthiness considerations.