CONFOCAL SCANNING LASER MICROSCOPY MEASUREMENTS OF THE GROWTH AND MORPHOLOGY OF MICROSTRUCTURALLY SHORT FATIGUE CRACKS IN A1 2024‐T351 ALLOY

Fatigue and Fracture of Engineering Materials and Structures - Tập 19 Số 9 - Trang 1153-1159 - 1996
A. Varvani‐Farahani1, T. H. Topper2, A. Plumtree1
1Mechanical Engineering Department
2Civil Engineering Department , University of Waterloo , Waterloo , Ontario , N2L 3G1 , Canada

Tóm tắt

Abstract— A new technique for studying the growth and morphology of microstructurally short fatigue cracks is described. The technique allows short crack growth, crack depth, and crack front configuration to be measured using Confocal Scanning Laser Microscopy (CSLM). Good agreement is shown between CSLM measurements of the initial stage of crack growth (along an inclined shear plane), crack depth and aspect ratio, together with the measurements obtained using a surface layer removal technique. It is also found that non‐propagating short fatigue cracks have approximately the same aspect ratios in different specimen orientations and that the aspect ratio is independent of stress amplitude.

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Tài liệu tham khảo

Wagner L., 1986, Small Fatigue Cracks, 117

10.1520/STP33457S

10.1016/0142-1123(81)90058-X

London B., 1986, The Behavior of Short Fatigue Cracks, 537

10.1016/0142-1123(83)90006-3

A.Varvani‐Farahani(1994)Non‐propagating fatigue crack behavior in different orientation of rolled A1 2024‐T351.MASc Thesis.University of Waterloo Waterloo Ontario Canada .

10.1179/imr.1984.29.1.445

10.1016/0013-7944(75)90004-1

10.1007/BF02657797

Blom A. F., 1986, The Behaviour of Short Fatigue Cracks, 37

Bolingbroke R. K., 1987, Third International Conference on Fatigue and Fatigue Thresholds, 281

O'Conner B. P. D., 1987, Third International Conference on Fatigue and Fatigue Thresholds, 281

Plumtree A., 1990, Proceedings of the Fourth International Conference on Fatigue and Fatigue Thresholds, 65

Tohgo K., 1990, Proceedings of the Fourth International Conference on Fatigue and Fatigue Thresholds, 567

10.1115/1.3571220

10.1016/0013-7944(71)90050-6

10.1016/0013-7944(82)90150-3

Oni O., 1986, The Behavior of Short Fatigue Cracks, 295

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Fatigue and Fracture of Engineering Materials and Structures

Tập 19 Số 9

1153-1159

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