Fatigue properties of 5056 Al-Mg alloy produced by equal-channel angular pressing

Vinogradov, Alexei; Nagasaki, Shunsuke; Patlan, V.; Kitagawa, Kazuo; Kawazoe, Masataka

doi:10.1016/s0965-9773(99)00392-x

Cited by 145 publications

(56 citation statements)

References 18 publications

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“…On the other hand, the ÁK th of the starting sheet (6.8 MPam 1=2 ) was higher than that of the ARB processed sheets. It has been reported that the ÁK th of Al alloys 5,6) and low carbon steel 7) decreased by the ECAP processing. It has been pointed out that the crack closure phenomena reduced by the ECAP.…”

Section: Resultsmentioning

confidence: 99%

“…Concerning the fatigue behaviors, crack growth rate (da= dN À ÁK), [5][6][7][8] fatigue life (S-N curve), [9][10][11] cyclic response (stress-strain curve, hysteresis loop), [9][10][11][12][13][14][15][16][17][18][19] etc., have been reported in the UFG materials with F.C.C. or B.C.C.…”

Section: Introductionmentioning

confidence: 99%

“…or B.C.C. structure, such as pure Cu, [11][12][13]15,17) Cu alloy, 8) Al alloy, 5,6,9,14,16,18) low carbon steel 7) and so on. 10,17,19) However, fatigue data of the UFG metals having H.C.P.…”

Section: Introductionmentioning

confidence: 99%

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Fatigue Crack Propagation Behavior in Commercial Purity Ti Severely Deformed by Accumulative Roll Bonding Process

et al. 2008

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Fatigue properties of commercial purity titanium sheets severely deformed by the accumulative roll bonding (ARB) process were investigated. The ARB process was carried out up to 6 cycles (equivalent strain, " eq. ¼ 4:8). The sheets ARB processed by 2-, 4-and 6-cycle consist of fine equiaxed grains and elongated lamellar grains. In the sheet ARB processed by 6-cycle, the mean size of fine equiaxed grain was 89 nm, and the mean thickness of the lamellar grains were 67 nm. The tensile strength increased with increasing the number of the ARB cycle. Fatigue crack growth tests were performed to clarify the fatigue properties such as the crack growth rate and threshold stress intensity factor range for crack growth (ÁK th ). The ÁK th of the ARB processed specimens were smaller than that of the starting sheet. The ÁK th decreased with increasing the number of the ARB cycle until 4-cycle. However, the ÁK th of 6-cycle specimen was larger than that of the 4-cycle specimen. Fracture surface of the 6-cycle specimen was different from that of the 2-and 4-cycle specimens. Fatigue crack propagation behavior changes between 4-and 6-cycle specimens. On the other hand, the crack growth rate decreases with increasing the number of the ARB cycle.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fatigue Crack Propagation Behavior in Commercial Purity Ti Severely Deformed by Accumulative Roll Bonding Process

et al. 2008

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“…Regarding the fatigue of UFG materials, most studies have concentrated on cyclic deformation, fatigue life, surface damage formation and underlying microstructural mechanisms [1][2][3][4][5][6]. Since the fatigue life of machine components and structures are mainly controlled by the growth life of a fatigue crack, the crack growth behavior should be clarified for the design of safe machine components and structures.…”

Section: Introductionmentioning

confidence: 99%

“…Since the fatigue life of machine components and structures are mainly controlled by the growth life of a fatigue crack, the crack growth behavior should be clarified for the design of safe machine components and structures. Recently, the growth behaviors of millimeter-range cracks in UFG metals were studied for compact-tension [5,7,8] and single edge-notched specimens [9,10]. On the other hand, the fatigue life of smooth specimens is approximately controlled by the growth life of a small surface crack [11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of crack growth rate and growth model of ultrafine grained copper

Goto

Han

Euh

et al. 2011

Computational Methods and Experimental Measurements XV

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High-cycle fatigue tests were carried out on smooth specimens of ultrafine grained (UFG) copper produced by equal channel angular pressing for 12 passes. The growth behavior of a small surface-crack was monitored. A major crack, which led to the final fracture of the specimen, initiated from shear bands (SBs) at an early stage of stressing. Different tendencies of growth behavior occurred depending on the ranges of crack length. To understand the changes in growth rate and fracture surface morphologies, a quantitative model describing a crack growth mechanism were developed considering the reversible plastic zone size at a crack tip. In addition, the crack growth rate of UFG copper was evaluated by applying the small-crack growth raw.

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