<p>In the present experimental work, unidirectional hot-rolling has been performed to study the effect of strain amount (i.e., 60, 70, 80, and 90 pct) on texture evolution in 0.3 CrMoV steel. The crystallographic texture analysis of the hot-rolled sample was performed on the surface and mid-thickness region. The study shows qualitatively similar texture components, depicting the effect of the plane strain compression across the thickness region. Increasing the rolling reduction enhances the fraction of fine equiaxed grains having smaller intra-grain misorientations. This low misorientation confirms the occurrence of continuous dynamic recrystallization phenomena. The crystallographic texture analysis shows that the texture intensity increases with increasing thickness reduction during hot rolling. The ODF analysis shows that the overall texture fibers (i.e., α-fiber, γ-fiber, and <InlineEquation ID="IEq122"> <EquationSource Format="TEX">$ \langle {{322}}\rangle $</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>322</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation>∥ND-fiber) are saturated during unidirectional rolling (from 60 pct to 90 pct) due to the uniform deformation. The maximum intensity of the ND-fiber, characterized with the highest volume fraction (21–24 pct), shifts to <InlineEquation ID="IEq123"> <EquationSource Format="TEX">$ \langle {{322}}\rangle $</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>322</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation>∥ND-fiber from its ideal location due to carbides and differences in deformation slip activity. The detailed analysis depicts that for <InlineEquation ID="IEq121"> <EquationSource Format="TEX">$ \langle {{110}}\rangle $</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>110</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation>∥RD-fiber, maximum intensity is observed at the location of {112}<InlineEquation ID="IEq1"> <EquationSource Format="TEX">$\langle 1{\bar{1} }0\rangle $</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>1</mn> <mover accent="true"> <mrow> <mn>1</mn> </mrow> <mrow> <mo stretchy="false">¯</mo> </mrow> </mover> <mn>0</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation> component, whereas for <InlineEquation ID="IEq124"> <EquationSource Format="TEX">$ \langle {{322}}\rangle $</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>322</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation>∥ND-fiber, maximum intensity is at {443}<InlineEquation ID="IEq2"> <EquationSource Format="TEX">$ \langle \bar{3}\bar{3}8 \rangle $</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mover accent="true"> <mrow> <mn>3</mn> </mrow> <mrow> <mo stretchy="false">¯</mo> </mrow> </mover> <mover accent="true"> <mrow> <mn>3</mn> </mrow> <mrow> <mo stretchy="false">¯</mo> </mrow> </mover> <mn>8</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation> component. The volume fraction of these components remains almost similar for both surface and mid-regions, irrespective of thickness reduction.</p>

Texture Evolution in 0.3 CrMoV Steel During Unidirectional Rolling (UDR): A Study Across Different Strain Levels

期刊论文
发表日期：

2025年11月28日

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Pravendra Pratap Singh,
M. K. Kathikeyan,
K. S. Suresh

摘要

In the present experimental work, unidirectional hot-rolling has been performed to study the effect of strain amount (i.e., 60, 70, 80, and 90 pct) on texture evolution in 0.3 CrMoV steel. The crystallographic texture analysis of the hot-rolled sample was performed on the surface and mid-thickness region. The study shows qualitatively similar texture components, depicting the effect of the plane strain compression across the thickness region. Increasing the rolling reduction enhances the fraction of fine equiaxed grains having smaller intra-grain misorientations. This low misorientation confirms the occurrence of continuous dynamic recrystallization phenomena. The crystallographic texture analysis shows that the texture intensity increases with increasing thickness reduction during hot rolling. The ODF analysis shows that the overall texture fibers (i.e., α-fiber, γ-fiber, and $ \langle {{322}}\rangle $ $⟨ 322 ⟩$ ∥ND-fiber) are saturated during unidirectional rolling (from 60 pct to 90 pct) due to the uniform deformation. The maximum intensity of the ND-fiber, characterized with the highest volume fraction (21–24 pct), shifts to $ \langle {{322}}\rangle $ $⟨ 322 ⟩$ ∥ND-fiber from its ideal location due to carbides and differences in deformation slip activity. The detailed analysis depicts that for $ \langle {{110}}\rangle $ $⟨ 110 ⟩$ ∥RD-fiber, maximum intensity is observed at the location of {112} $\langle 1{\bar{1} }0\rangle $ $⟨ 1 \bar{1} 0 ⟩$ component, whereas for $ \langle {{322}}\rangle $ $⟨ 322 ⟩$ ∥ND-fiber, maximum intensity is at {443} $ \langle \bar{3}\bar{3}8 \rangle $ $⟨ \bar{3} \bar{3} 8 ⟩$ component. The volume fraction of these components remains almost similar for both surface and mid-regions, irrespective of thickness reduction.