A unified symmetry of nonholonomic mechanical systems in phase space

王鹏,; 方建会,; 丁宁,; 张鹏玉,

doi:10.1088/1009-1963/15/7/002

Cited by 9 publications

(2 citation statements)

References 12 publications

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“…The results of the study of Peng and Ning for the influence of cold deformation degree after aging on the re-aging microstructure and properties of 7A04 alloys show that thermomechanical treatment is an effective way to improve both the plasticity and strength of alloys simultaneously [15]. In the development of high strength aluminium alloy, strength, toughness and corrosion resistance usually cannot be taken into account at the same time.…”

Section: Introductionmentioning

confidence: 99%

Research on Multiple Plastic Deformations of Ultra-High Strength Aluminium Alloy

Cui

Zhang

et al. 2013

AMR

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Research on multipass plastic deformation of 7A04 ultra-high strength aluminium alloy by isothermal compression experiments on the 6300KN extrusion press. Experiment results show that elongation reaches its maximal value 9.25% after the first deformation. It is obvious that fibrous tissues appeared along the metal flow direction in the deformed 7A04 ultra-high aluminium alloy, with heterogeneous distribution of precipitated η (MgZn2) phase in the matrix, which results in lower strength (Rm=335MPa, Re=212.5MPa). As the times of deformation increases, precipitated phases grow gradually and the plasticity of alloys decreases dramatically, which reaches its minimal value 5.17% after the fourth deformation. With η(MgZn2) phase disperses gradually, the strength of the alloy increases gradually, and reaches its maximal value 386.7MPa after the fourth deformations. It is proved that 7A04 high-strength aluminium alloy has better synthetic mechanical properties after four times deformation.

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Section: Introductionmentioning

confidence: 99%

Research on Multiple Plastic Deformations of Ultra-High Strength Aluminium Alloy

Cui

Zhang

et al. 2013

AMR

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“…Recently, many efforts have been made to develop electromagnetic wave absorption materials because of the fact that radar-absorbing technology is widely used in commercial and military applications [1][2][3][4][5][6][7]. Silicon carbide materials have many practical and potential applications in microwave absorption [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%