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<p>Compared to α + β titanium alloys, β titanium alloys exhibit superior heat treatment strengthening effects. Specifically, after solid solution treatment followed by two-stage aging, the alloy features finer secondary α (α<sub>s</sub>) phases compared to primary α (α<sub>p</sub>) phases, resulting in enhanced second phase strengthening effects. This study focuses on the effects of various aging parameters on the texture evolution of an as extruded high strength metastable β titanium alloy Ti-4Al-6V-5Mo-3Cr-1Zr using synchrotron high-energy X-ray diffraction and electron microscopy. After extrusion, two primary fiber textures are formed within the β phase: &lt; 200 &gt; and &lt; 110 &gt; fiber texture. The intensity of β phase texture fluctuates during aging primarily attributed to phase transformations altering the volume fractions of the two phases. The α phase predominantly exhibited the conventional &lt; 0002 &gt; fiber texture, along with an unconventional &lt; 10 <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10853_2025_10868_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="10" /> </InlineMediaObject> <EquationSource Format="TEX">\(\overline{1 }\)</EquationSource> <EquationSource Format="MATHML"><math> <mover> <mn>1</mn> <mo>¯</mo> </mover> </math></EquationSource> </InlineEquation> 1 &gt; component rarely reported in prior studies of metastable β titanium alloys, with their orientations rotating during high-temperature aging. This rotation originates from variant selection during the precipitation of α<sub>s</sub> phase from the β matrix, leading to crystallographic orientations distinct from the preferred orientation of α<sub>p</sub> phase formed during extrusion.</p>

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Effect of solution and aging on the texture evolution of an extruded metastable β titanium alloy Ti-4Al-6V-5Mo-3Cr-1Zr

  • 期刊论文

  • 发表日期：

    2025年4月25日

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  • Chenying Xi,
  • Lin Song,
  • Yunxi Liu,
  • Daria Lazurenko,
  • Tiebang Zhang

摘要

Compared to α + β titanium alloys, β titanium alloys exhibit superior heat treatment strengthening effects. Specifically, after solid solution treatment followed by two-stage aging, the alloy features finer secondary α (αs) phases compared to primary α (αp) phases, resulting in enhanced second phase strengthening effects. This study focuses on the effects of various aging parameters on the texture evolution of an as extruded high strength metastable β titanium alloy Ti-4Al-6V-5Mo-3Cr-1Zr using synchrotron high-energy X-ray diffraction and electron microscopy. After extrusion, two primary fiber textures are formed within the β phase: < 200 > and < 110 > fiber texture. The intensity of β phase texture fluctuates during aging primarily attributed to phase transformations altering the volume fractions of the two phases. The α phase predominantly exhibited the conventional < 0002 > fiber texture, along with an unconventional < 10 \(\overline{1 }\) 1 ¯ 1 > component rarely reported in prior studies of metastable β titanium alloys, with their orientations rotating during high-temperature aging. This rotation originates from variant selection during the precipitation of αs phase from the β matrix, leading to crystallographic orientations distinct from the preferred orientation of αp phase formed during extrusion.