选择性激光熔化成形316SS的低周疲劳和蠕变疲劳性能

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

Materials at High Temperatures Pub Date : 2023-05-01 DOI:10.1080/09603409.2023.2205761

Lingfeng Pan, Peishan Ding, Dezhou Kong, Lijun Liu, Xiaotao Zheng

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引用次数: 0

摘要

研究了选择性激光熔化(SLM) 316SS试样的疲劳和蠕变疲劳性能，考虑了不同的峰值应力、应力速率和峰值保持时间对不同取样角度(0°、90°)和高温(550°C、650°C、750°C)下SLM 316SS试样棘轮和蠕变-棘轮行为的影响。结果表明，90°试样的疲劳寿命优于0°试样。棘轮演化可分为三个阶段，但第一阶段很短，主要棘轮行为发生在第二和第三阶段。有趣的是，当应力速率大于10 MPa/s时，棘轮演化曲线高度重叠。蠕变-疲劳相互作用促进了材料损伤的演化。此外，即使停留时间较短(0.5 min)，蠕变也会使316SS的总应变增加。

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Low cycle fatigue and creep–fatigue performance of 316SS formed by selective laser melting

ABSTRACT The fatigue and creep–fatigue properties of 316SS formed by selective laser melting (SLM) were investigated, considering the effects of different peak stresses, stress rates and peak-holding times on the ratcheting and creep-ratcheting behaviour of SLM 316 SS specimens at different sampling angles (0°, 90°) and high temperatures (550°C, 650°C, 750°C). Results show that the 90° specimens exhibited better fatigue life than that of the 0° specimens. Moreover, the ratcheting evolution can be divided into three stages, but the first stage is very short and the main ratcheting behaviour takes place in the second and third stages. Interestingly, it was found that at stress rates above 10 MPa/s, the ratcheting evolution curves are highly overlapping. Furthermore, the creep–fatigue interaction promotes the evolution of material damage. Besides, creep increases the total strain of 316SS even with a short dwell time (0.5 min).

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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.