Strain dependence of deformation and recrystallization microstructure homogeneity in clock-rolled tantalum sheets

Zhu, Jialin; Liu, Shifeng; Yang, Shuai; Long, Doudou; Liu, Yahui; Yuan, Xiaoli; Orlov, Dmitry

doi:10.1016/j.matchar.2020.110165

Cited by 7 publications

(7 citation statements)

References 46 publications

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“…It should be noted that a relatively strong {111} orientation with a large size is found in the center layer of samples after UR (Figure 8a). The microstructure with {111} orientation splits greatly, resulting in uneven grain deformation, as reported by Zhu [9].…”

Section: Microstructure After Annealingmentioning

confidence: 70%

“…Thus, the Ta target with excellent performance depends on the uniformity of microstructure and texture [1][2][3][4]. Previous studies have exhibited that 135 • cross rolling could more effectively improve the microstructure and texture homogeneity of Ta plates along the thickness direction than the conventional unidirectional rolling (UR) [5][6][7][8][9][10]. Conventional unidirectional rolled Ta sheets suffered from uneven grain size distribution and texture clusters retained after annealing [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have exhibited that 135 • cross rolling could more effectively improve the microstructure and texture homogeneity of Ta plates along the thickness direction than the conventional unidirectional rolling (UR) [5][6][7][8][9][10]. Conventional unidirectional rolled Ta sheets suffered from uneven grain size distribution and texture clusters retained after annealing [7][8][9]. Texture gradients and residual deformation bands caused damage to the properties of the target material in UR-annealed samples [9].…”

Section: Introductionmentioning

confidence: 99%

“…Conventional unidirectional rolled Ta sheets suffered from uneven grain size distribution and texture clusters retained after annealing [7][8][9]. Texture gradients and residual deformation bands caused damage to the properties of the target material in UR-annealed samples [9]. {100} <uvw> and {111} <uvw> were two main fiber textures obtained by UR, which displayed different subdivision behaviors and stored energy, causing different recrystallization driving forces [1].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Warm Crossing Rolling on the Microstructure, Texture and Annealing Behavior of High-Purity Tantalum

Ding

Wang

Zhang

et al. 2023

Metals

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With advanced integrated circuit semiconductor chips, the uniformity of microstructure and texture is increasingly required for tantalum (Ta) targets. A combination of warm rolling and 135° cross rolling (CR) at the temperature of 500 °C and 800 °C, i.e., warm cross rolling (WCR), was carried out in tantalum (Ta) plates to investigate the evolution of deformed microstructure and texture. Subsequently, these rolled samples were annealed to analyze the recrystallized microstructure. Results exhibited that WCR samples formed a relatively uniform and weak texture distribution along the thickness direction. The reduction in the proportion of low-angle grain boundaries (LAGBs) was associated with the lower Peierls stresses to be overcome for dislocation motion due to thermal activation in the WCR sample. High grain boundary energy was observed in WCR samples, and WCR can promote dynamic recovery of samples to produce sub-crystals (thermodynamically unstable and serving as nuclei for subsequent recrystallization). Fine average grain size and high content of recrystallized grains with random orientation were obtained after annealing in the WCR sample. This study will provide a theoretical reference for the precise optimization of tantalum process parameters and the improvement in the target material’s performance.

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Section: Microstructure After Annealingmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Warm Crossing Rolling on the Microstructure, Texture and Annealing Behavior of High-Purity Tantalum

Ding

Wang

Zhang

et al. 2023

Metals

Self Cite

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show abstract

“…Recent studies by our team [9][10][11][12] revealed that a change in strain path during rolling, i.e., 135 • cross rolling, can efficiently refine grain size, weaken texture intensity and even eliminate residual deformation bands in high-purity Ta plates. On the other hand, numerous studies [13][14][15] have shown that warm rolling also has an important effect on regulating and controlling the evolution of microstructure and texture.…”

Section: Introductionmentioning

confidence: 99%

Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing

Long

Liu

Zhu

et al. 2021

Metals

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The evolution of texture and microstructure uniformity in high-purity tantalum (Ta) sheets during 135° warm cross rolling (WCR) was analyzed in detail. X-ray diffraction suggested that relatively uniform ‘ideal’ deformation texture distribution across the thickness could be obtained from WCR, since more potential slip systems could be activated. Electron backscatter diffraction (EBSD) results indicated that the change in strain path in warm rolling could enhance dislocations mobility and increase the probability of dislocations rearrangement and annihilation. Thus, the proportion of low-angle grain boundaries was significantly reduced, and more sub-grain boundaries or sub-grains were formed via WCR. The calculation of geometrically necessary dislocation density based on the strain gradient model supports this result. The analysis of relative Schmid factor combined with the strain contouring map indicated that inhomogeneous orientation-dependent grain subdivision could be effectively weakened, and relatively uniform strain distribution could be formed in the WCR sample. Upon annealing, uniform fine grain size and more randomly oriented grains were obtained in the WCR sample after the completion of recrystallization because of relatively uniform grain subdivision and stored energy distribution.

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Cohesive strength of plasma sprayed Ni-10wt.%Al coatings enhanced by ultrasonic and depended on the power density

Liu,

Wang,

Wang

et al. 2024

Appl. Phys. A

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Strain dependence of deformation and recrystallization microstructure homogeneity in clock-rolled tantalum sheets

Cited by 7 publications

References 46 publications

Effect of Warm Crossing Rolling on the Microstructure, Texture and Annealing Behavior of High-Purity Tantalum

Effect of Warm Crossing Rolling on the Microstructure, Texture and Annealing Behavior of High-Purity Tantalum

Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing

Cohesive strength of plasma sprayed Ni-10wt.%Al coatings enhanced by ultrasonic and depended on the power density

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