<p>The present paper provides a comparative study of in-depth milling-induced residual stress (MIRS) measurement in Al 3003 processed by non-equal channel angular pressing (NECAP) which exhibit fundamental knowledge to understand the MIRS in grain refinement materials. To evaluate MIRS, combination of two commonly used experimental methods, X-ray diffraction (XRD) and the incremental hole drilling method with digital image correlation (IHD-DIC), have been employed. Billets of Al 3003 with the same dimensions before and after NECAP process have been used as workpieces that are machined under the same milling conditions, including the cutting speed (565 rev/min), depth of cut (1.5 mm), and feed rate (200 mm/min). MIRS on the surface and along the depth of the workpieces has been measured in the cutting direction (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="170_2025_15947_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="24" /> </InlineMediaObject> <EquationSource Format="TEX">${\sigma }_{\text{xx}}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>σ</mi> <mtext>xx</mtext> </msub> </math></EquationSource> </InlineEquation>) and perpendicular to the cutting direction (<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="170_2025_15947_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="24" /> </InlineMediaObject> <EquationSource Format="TEX">${\sigma }_{\text{yy}}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>σ</mi> <mtext>yy</mtext> </msub> </math></EquationSource> </InlineEquation>). The experimental results for the range of values studied revealed that MIRS in Al3003 subjected to the NECAP process is shifted from tensile to compressive and notably surface MIRS in both directions is lower (19.22% for <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="170_2025_15947_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="24" /> </InlineMediaObject> <EquationSource Format="TEX">${\sigma }_{\text{xx}}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>σ</mi> <mtext>xx</mtext> </msub> </math></EquationSource> </InlineEquation> and 17.38% for <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="170_2025_15947_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="24" /> </InlineMediaObject> <EquationSource Format="TEX">${\sigma }_{\text{yy}}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>σ</mi> <mtext>yy</mtext> </msub> </math></EquationSource> </InlineEquation>) than that found in workpiece before the process.</p>

Effect of non-equal channel angular pressing on milling-induced residual stress

期刊论文
发表日期：

2025年6月16日

查看全文

Mohammad Hadi Gholami,
Mohammad Honarpisheh,
Saeid Amini

摘要

The present paper provides a comparative study of in-depth milling-induced residual stress (MIRS) measurement in Al 3003 processed by non-equal channel angular pressing (NECAP) which exhibit fundamental knowledge to understand the MIRS in grain refinement materials. To evaluate MIRS, combination of two commonly used experimental methods, X-ray diffraction (XRD) and the incremental hole drilling method with digital image correlation (IHD-DIC), have been employed. Billets of Al 3003 with the same dimensions before and after NECAP process have been used as workpieces that are machined under the same milling conditions, including the cutting speed (565 rev/min), depth of cut (1.5 mm), and feed rate (200 mm/min). MIRS on the surface and along the depth of the workpieces has been measured in the cutting direction ( ${\sigma }_{\text{xx}}$ $σ_{xx}$ ) and perpendicular to the cutting direction ( ${\sigma }_{\text{yy}}$ $σ_{yy}$ ). The experimental results for the range of values studied revealed that MIRS in Al3003 subjected to the NECAP process is shifted from tensile to compressive and notably surface MIRS in both directions is lower (19.22% for ${\sigma }_{\text{xx}}$ $σ_{xx}$ and 17.38% for ${\sigma }_{\text{yy}}$ $σ_{yy}$ ) than that found in workpiece before the process.