Dynamic failure mechanism of copper foil in laser dynamic flexible forming

• Autorzy: Shen Zongbao , Zhang Lei , Li Pin , Liu Kai , Lin Youyu , Zhou Guoyang , Wang Yang , Zhang Jindian , Liu Huixia , Wang Xiao

Identyfikatory

DOI

10.2478/msp-2020-0083

• Języki publikacji: EN

Abstrakty

EN

Laser dynamic flexible forming (LDFF) is a novel high velocity forming (HVF) technology, in which the foil metal is loaded by laser shock wave. Strain localization is readily to occur around the bulge edge, which will result in the ultimate dynamic failure. In this work, the microstructures before and after dynamic fracture are characterized by transmission electron microscopy (TEM) to investigate the dynamic failure mechanism. The plastic deformation regions of copper foil are composed of shock compression, strain localization and bulge. Microstructure refinement was observed in three different plastic deformation regions, particularly, dynamic recrystallization (DRX) occurs in the strain localization and bulge regions. In bulge region, extremely thin secondary twins in the twin/matrix (T/M) lamellae are formed. The microstructure features in the strain localization region show that superplastic flow of material exists until fracture, which may be due to DRX and subsequent grain boundary sliding (GBS) of the recrystallized grains. The grain coarsening in strain localization region may degrade the material flowing ability which results in the dynamic fracture.

Słowa kluczowe

EN

laser dynamic flexible forming; strain localization; dynamic failure; dynamic recrystallization; grain coarsening

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2020
• Tom: Vol. 38, No. 4
• Strony: 684--692
• Opis fizyczny: Bibliogr. 40 poz., rys.

Twórcy

autor

Shen Zongbao

• School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
• School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
• SUMEC Hardware and Tools Co., Ltd., Nanjing 210032, China

autor

Zhang Lei

• School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

autor

Li Pin

• School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

autor

Liu Kai

• SUMEC Hardware and Tools Co., Ltd., Nanjing 210032, China

autor

Lin Youyu

• SUMEC Hardware and Tools Co., Ltd., Nanjing 210032, China

autor

Zhou Guoyang

• SUMEC Hardware and Tools Co., Ltd., Nanjing 210032, China

autor

Wang Yang

• SUMEC Hardware and Tools Co., Ltd., Nanjing 210032, China

autor

Zhang Jindian

• School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

autor

Liu Huixia

• School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

autor

Wang Xiao

• School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).