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<p>A model-based data analysis of the depth measurements performed during percussion drilling in stainless steel reveals the occurrence of microstructures by observed deviations from model expectations. For the data analysis, an adaptive correction factor <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="339_2024_8130_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">\({c}_{\text{A}}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>c</mi> <mtext>A</mtext> </msub> </math></EquationSource> </InlineEquation> was introduced into an analytical drilling model to account for changes in the absorptance caused by the microstructures. The analysis of the temporal evolution of <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="339_2024_8130_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">\({c}_{\text{A}}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>c</mi> <mtext>A</mtext> </msub> </math></EquationSource> </InlineEquation> during drilling shows that the presence of microstructures coincides with an increased absorption, while the formation of a single borehole tip is associated with a reduced absorption.</p>

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Investigations into the occurrence of microstructures by means of in-situ depth measurements during percussion drilling with ultrashort laser pulses

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月9日

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  • A. Feuer,
  • R. Feuer,
  • S. Boley,
  • D. J. Förster,
  • B. Neuenschwander,
  • C. Hagenlocher,
  • A. Michalowski,
  • T. Graf

摘要

A model-based data analysis of the depth measurements performed during percussion drilling in stainless steel reveals the occurrence of microstructures by observed deviations from model expectations. For the data analysis, an adaptive correction factor \({c}_{\text{A}}\) c A was introduced into an analytical drilling model to account for changes in the absorptance caused by the microstructures. The analysis of the temporal evolution of \({c}_{\text{A}}\) c A during drilling shows that the presence of microstructures coincides with an increased absorption, while the formation of a single borehole tip is associated with a reduced absorption.