中间电脉冲处理超薄钛板成形性能加速恢复的机理

IF 3.2 3区工程技术 Q2 ENGINEERING, INDUSTRIAL

Cirp Annals-Manufacturing Technology Pub Date : 2025-01-01 DOI:10.1016/j.cirp.2025.03.020

Junying Min, Xianglu Zhang, Bo Chen, Xiaolong Ma

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引用次数: 0

摘要

在电脉冲处理（EPT）下，0.1 mm CP-Ti片材的静态恢复和再结晶可在显著缩短的时间（≤2 s）内实现成形性恢复，但其潜在机制尚不清楚。实验证实，预变形CP-Ti的成形性恢复主要受EPT温度的影响，且在623 K左右存在阈值。电子背散射衍射表征表明，EPT的加速恢复主要是由于激活了位错爬升，增加了再结晶成核位点，增强了晶界迁移，这归因于EPT的“靶效应”。

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Mechanisms driving accelerated formability recovery in forming of ultra-thin titanium sheets with intermediate electropulsing treatment

Formability recovery resulting from static recovery and recrystallization of 0.1 mm CP-Ti sheets can be achieved in remarkably reduced time (≤2 s) under electropulsing treatment (EPT), yet the underlying mechanisms remain unclear. This study experimentally confirms that the formability recovery of pre-deformed CP-Ti is predominated by EPT temperature with existence of a threshold for its onset at approximately 623 K. Characterization using electron backscatter diffraction suggests that the accelerated recovery by EPT is primarily attributed to the activation of dislocation climb, increased recrystallization nucleation sites, and enhanced grain boundary migration, which is attributed to the “target effect” of EPT.

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来源期刊

Cirp Annals-Manufacturing Technology 工程技术-工程：工业

CiteScore

7.50

自引率

9.80%

发文量

137

审稿时长

13.5 months

期刊介绍： CIRP, The International Academy for Production Engineering, was founded in 1951 to promote, by scientific research, the development of all aspects of manufacturing technology covering the optimization, control and management of processes, machines and systems. This biannual ISI cited journal contains approximately 140 refereed technical and keynote papers. Subject areas covered include: Assembly, Cutting, Design, Electro-Physical and Chemical Processes, Forming, Abrasive processes, Surfaces, Machines, Production Systems and Organizations, Precision Engineering and Metrology, Life-Cycle Engineering, Microsystems Technology (MST), Nanotechnology.