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説明:

This is a first report on profilometry-based indentation plastometry (PIP) at high temperature (HT), covering both thermal characterization and issues for obtaining stress–strain curves. The heating system has a relatively low thermal inertia, reaching 800 °C within about 10 min, while both indentation (≈20 s) and cooling (≈20 min) are also quick. This capability is useful in terms of limiting exposure of the sample to prolonged periods at HT, and hence avoiding the formation of thick oxide layers (which can affect indent profiles and hence inferred stress–strain curves). There is good general consistency between stress–strain curves obtained via HT-PIP and those from tensile testing. However, the possibility of creep (time-dependent deformation) affecting the outcomes (of both types of test), particularly at higher temperatures, should be borne in mind. Creep has a characteristic effect on tensile curves, which can often be confirmed and investigated by changing the imposed strain rate. It can also be revealed by carrying out the HT-PIP testing with different penetration velocities or by monitoring the shape of the load–displacement plot.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Indentation plastometry, Stress-strain curve, Tensile testing, Creep, High temperature

刊行年月日: 2024-08-28

出版者: Wiley

掲載誌:

• Advanced Engineering Materials (ISSN: 14381656)

研究助成金:

• Engineering and Physical Sciences Research Council EP/I038691/1
• Leverhulme Trust IN‐2016‐004
• Leverhulme Trust EM/2019‐038/4
• Innovate UK 10006185
• Innovate UK MR/W01338X/1

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/adem.202301073

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更新時刻: 2024-09-25 16:30:38 +0900

MDRでの公開時刻: 2024-09-25 16:30:38 +0900