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Effect of Strain Rate on the Microstructure and Mechanical Properties of AA2B06-O Aluminum Alloy of the Al-Cu-Mg System
Khina, B. B.1; Pokrovsky, A., I2; Zhang, Shi-Hong3; Xu, Yong3; Chen, Da-Yong3; Marysheva, A. A.2
Corresponding AuthorKhina, B. B.(khina_brs@mail.ru)
2021-09-01
Source PublicationRUSSIAN JOURNAL OF NON-FERROUS METALS
ISSN1067-8212
Volume62Issue:5Pages:545-553
AbstractThe mechanical properties in the tension and microstructure of aviation aluminum alloy AA2B06-O (the Al-Cu-Mg system) at low (10(-3)-1 s(-1)) and high (1293-5045 s(-1)) strain rates are studied. At relatively slow (quasistatic) tension, the stain rate has a small effect on the mechanical properties. Upon fast (dynamic) loading, a raising strain rate results in a substantial, by a factor of about 2, simultaneous increase in the ultimate tensile strength of the alloy and its plasticity (elongation to failure), whereas the yield stress remains almost unchanged. Transmission electron microscopy has revealed a homogeneous nature of plastic deformation on the microlevel upon slow loading and an inhomogeneous one upon fast loading. The latter reveals itself in the localization of deformation in the form of adiabatic microshear bands where complex dislocation structures are formed, such as dislocation tangles and dipole and multipole configurations. In certain domains of microshear bands, the first stage of dynamic recrystallization is observed because of the heat release of localized plastic deformation. It is shown that the changeover of deformation mechanisms when passing from quasistatic to dynamic tension is responsible for the drastic change in mechanical behavior of the material. Thus, a simultaneous increase in both strength and plasticity can take place not only in nanostructured materials obtained by severe plastic deformation techniques, e.g., equal channel angular extrusion, but also upon high strain rate deformation of an aluminum alloy having an ordinary microstructure after rolling and low-temperature annealing. The experimental results open up new prospects for the practical application of methods of high strain rate pulse deformation, such as impact hydroforming, for producing complexly shaped articles made out of sheet blanks by a single operation due to the substantially improved technological plasticity of the material.
Keywordimpact hydroforming aluminum alloys high strain rate deformation mechanical properties technological plasticity microstructure dislocations adiabatic microshear bands
Funding OrganizationBelarussian Republican Foundation for Fundamental Research
DOI10.3103/S1067821221050060
Indexed BySCI
Language英语
Funding ProjectBelarussian Republican Foundation for Fundamental Research[T19KITG-001]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000714928300009
PublisherPLEIADES PUBLISHING INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167206
Collection中国科学院金属研究所
Corresponding AuthorKhina, B. B.
Affiliation1.Belorussian State Aviat Acad, Minsk 220096, BELARUS
2.Natl Acad Sci Belarus, Physicotech Inst, Minsk 220141, BELARUS
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Khina, B. B.,Pokrovsky, A., I,Zhang, Shi-Hong,et al. Effect of Strain Rate on the Microstructure and Mechanical Properties of AA2B06-O Aluminum Alloy of the Al-Cu-Mg System[J]. RUSSIAN JOURNAL OF NON-FERROUS METALS,2021,62(5):545-553.
APA Khina, B. B.,Pokrovsky, A., I,Zhang, Shi-Hong,Xu, Yong,Chen, Da-Yong,&Marysheva, A. A..(2021).Effect of Strain Rate on the Microstructure and Mechanical Properties of AA2B06-O Aluminum Alloy of the Al-Cu-Mg System.RUSSIAN JOURNAL OF NON-FERROUS METALS,62(5),545-553.
MLA Khina, B. B.,et al."Effect of Strain Rate on the Microstructure and Mechanical Properties of AA2B06-O Aluminum Alloy of the Al-Cu-Mg System".RUSSIAN JOURNAL OF NON-FERROUS METALS 62.5(2021):545-553.
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