Size effects on the constitutive behaviour for brass in sheet metal forming

Micheľ, J.; Picart, Philippe

doi:10.1016/s0924-0136(03)00570-3

Cited by 119 publications

(60 citation statements)

References 8 publications

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“…For example, it was shown that the flow stress increases with decreasing specimen thickness when the ratio of specimen size to grain size is reduced below a critical value [7]. Similar results were also reported for several different materials [8][9][10].…”

Section: Introductionsupporting

confidence: 73%

Effect of grain size and specimen dimensions on micro-forming of high purity aluminum

Zhu

Shan

et al. 2015

Materials Science and Engineering: A

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Micro-compression testing was conducted using high purity Al processed by equal-channel angular pressing (ECAP) with both coarse-grained (CG) and ultrafine-grained (UFG) samples. The effects on the flow stresses of the initial grain size and the specimen size were investigated and the results show the initial grain sizes and the specimen dimensions affect the flow stresses during micro-compression for both CG and UFG specimens. There is a transition from strain hardening to strain softening with decreasing grain size during micro-compression but the transition grain size is dependent upon the size of the specimen. These results are interpreted using a model based on the separate influences of dislocation annihilation and dislocation accumulation in the UFG and CG materials, respectively. The results demonstrate that the occurrence of surface roughening is improved when using UFG pure Al and this shows there is a significant potential for using UFG pure Al in micro-forming operations.

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Section: Introductionsupporting

confidence: 73%

Effect of grain size and specimen dimensions on micro-forming of high purity aluminum

Zhu

Shan

et al. 2015

Materials Science and Engineering: A

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“…The tendency was also observed for different materials such as Cu and Al foil. 18) The size effect of specimen geometrical dimension on micro-tensile test can be explained by into the Swift model, 19) Where, K is hardening index, ¾ 0 is initial strain and n is working hardening index. The material parameters related to the Swift model for each thickness are presented in Table 3 and Fig.…”

Section: Processmentioning

confidence: 99%

Specimen Dimension and Grain Size Effects on Deformation Behavior in Micro Tensile of SUS304 Stainless Steel Foil

Guo

Shan

et al. 2013

Mater. Trans.

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Size effects are the main problem in micro-forming process and material behavior with miniaturization of feature size. In the paper, size effects of grain size and foil thickness on deformation behavior and fracture were investigated by using micro tensile test of SUS304 foil. The results show that the yield strength of SUS304 stainless foil increases with the decrease of foil thickness and grain size in micro tensile tests. Meanwhile, the fracture mechanism of SUS304 foil changes from ductile fracture with lots of dimples to ductile fracture with slip separation with the decrease of foil thickness. A compound material model by considering grain size, foil thickness and surface effects is proposed and constitutive relation of SUS304 foil is established. The calculation curves well match with experimental results.

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“…However, when the size of the samples become very small, to a critical thickness, the mechanical properties and damage behaviors of the materials will have obvious size effects [26][27][28]. The flow stress decreased with the thickness of samples decreasing from several millimeters to one hundred micrometers [25,29,30].…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior of Al0.25CoCrFeNi High-Entropy Alloy after Recrystallization

Hou

Zhang

Yang

et al. 2017

Metals

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Cold rolling with subsequent annealing can be used to produce the recrystallized structure in high entropy alloys (HEAs). The Al 0.25 CoCrFeNi HEAs rolled to different final thickness (230, 400, 540, 800, 1000, 1500 µm) are prepared to investigate their microstructure evolutions and mechanical behaviors after annealing. Only the single face-centered cubic phase was obtained after cold rolling and recrystallization annealing at 1100 • C for 10 h. The average recrystallized grain size in this alloy after annealing ranges from 92 µm to 136 µm. The annealed thin sheets show obviously size effects on the flow stress and formability. The yield strength and tensile strength decrease as t/d (thickness/average grain diameter) ratio decreases until the t/d approaches 2.23. In addition, the stretchability (formability) decreases with the decrease of the t/d ratio especially when the t/d ratio is lower than about 6. According to the present results, yield strength can be expressed as a function of the t/d ratio.

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Size effects on the constitutive behaviour for brass in sheet metal forming

Cited by 119 publications

References 8 publications

Effect of grain size and specimen dimensions on micro-forming of high purity aluminum

Effect of grain size and specimen dimensions on micro-forming of high purity aluminum

Specimen Dimension and Grain Size Effects on Deformation Behavior in Micro Tensile of SUS304 Stainless Steel Foil

Deformation Behavior of Al0.25CoCrFeNi High-Entropy Alloy after Recrystallization

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