<p>The present work investigated the influence of pre-annealing on recrystallization behavior and texture evolution of a tensile-twin-containing Zr702. A novel multi-directional rolling (MDR) at liquid nitrogen temperature was utilized to introduced dense tensile twins in Zr702. Simple annealing at 650 ℃ for 30 min and pre-annealing at 500 ℃ for 30, 60 and 90 min or at 550 ℃ for 10, 20 and 30 min followed by annealing at 650 ℃ for 30 min were performed on the MDR samples. The conventional discontinuous recrystallization occurred in twinned grains during simple annealing at 650 ℃ for 30 min, which resulted in a recrystallization texture of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$\langle 0001\rangle$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>0001</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation> close to transverse direction (TD). A small number of recrystallized grains formed during pre-annealing at 500 ℃ for 90 min and at 550 ℃ for 30 min, which exhibited a texture of <InlineEquation ID="IEq2"> <EquationSource Format="TEX">$\langle 0001\rangle$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>0001</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation> close to TD and <InlineEquation ID="IEq3"> <EquationSource Format="TEX">$\langle 0001\rangle$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>0001</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation> aligned on normal direction (ND) respectively. Pre-annealing at 500 ℃ for 30 and 90 min did not change the recrystallization behavior and texture during followed annealing at 650 ℃. Pre-annealing at 500 ℃ for 60 min resulted in oriented nucleation and preferred growth during followed annealing at 650 ℃, which generated a bimodal basal texture with the <InlineEquation ID="IEq4"> <EquationSource Format="TEX">$\langle c\rangle$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mi>c</mi> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation> axes close to ND. Pre-annealing at 550 ℃ for 10 min promoted the formation of texture component of <InlineEquation ID="IEq5"> <EquationSource Format="TEX">$\langle c\rangle$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mi>c</mi> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation> axes close to ND during the early stage of followed annealing at 650 ℃, however, which did not affect the final recrystallization texture. Pre-annealing at 550 ℃ for 20 and 30 min did not affect the recrystallization behavior and texture during followed annealing at 650 ℃. The recrystallized grains formed at 550 ℃ for 30 min contributed little to the final texture.</p>

Effect of pre-annealing on recrystallization and texture development in a multi-directional rolled Zr702

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发表日期：

2026年1月23日

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Qinghui Zeng,
Haonan Xiong,
Qiao Yang,
Lixia Wang,
Risheng Qiu,
Zhongni Liao,
Min Zhang

摘要

The present work investigated the influence of pre-annealing on recrystallization behavior and texture evolution of a tensile-twin-containing Zr702. A novel multi-directional rolling (MDR) at liquid nitrogen temperature was utilized to introduced dense tensile twins in Zr702. Simple annealing at 650 ℃ for 30 min and pre-annealing at 500 ℃ for 30, 60 and 90 min or at 550 ℃ for 10, 20 and 30 min followed by annealing at 650 ℃ for 30 min were performed on the MDR samples. The conventional discontinuous recrystallization occurred in twinned grains during simple annealing at 650 ℃ for 30 min, which resulted in a recrystallization texture of $\langle 0001\rangle$ $⟨ 0001 ⟩$ close to transverse direction (TD). A small number of recrystallized grains formed during pre-annealing at 500 ℃ for 90 min and at 550 ℃ for 30 min, which exhibited a texture of $\langle 0001\rangle$ $⟨ 0001 ⟩$ close to TD and $\langle 0001\rangle$ $⟨ 0001 ⟩$ aligned on normal direction (ND) respectively. Pre-annealing at 500 ℃ for 30 and 90 min did not change the recrystallization behavior and texture during followed annealing at 650 ℃. Pre-annealing at 500 ℃ for 60 min resulted in oriented nucleation and preferred growth during followed annealing at 650 ℃, which generated a bimodal basal texture with the $\langle c\rangle$ $⟨ c ⟩$ axes close to ND. Pre-annealing at 550 ℃ for 10 min promoted the formation of texture component of $\langle c\rangle$ $⟨ c ⟩$ axes close to ND during the early stage of followed annealing at 650 ℃, however, which did not affect the final recrystallization texture. Pre-annealing at 550 ℃ for 20 and 30 min did not affect the recrystallization behavior and texture during followed annealing at 650 ℃. The recrystallized grains formed at 550 ℃ for 30 min contributed little to the final texture.