Fatigue Crack Growth in an Al O Short Fiber Reinforced Al-2Mg Alloy

S Preston; A Melander; HL Groth; AF Blom

doi:10.1520/STP25402S

SYMPOSIA PAPER Published: 01 January 1990

STP25402S

Fatigue Crack Growth in an Al O Short Fiber Reinforced Al-2Mg Alloy

Source

Metal matrix composites (Al-2Mg) reinforced with 10% by volume “Saffil” fibers were manufactured by a pressure infiltration technique. The initiation and growth of fatigue cracks in these composites were investigated by two methods.

Fatigue crack initiation and early crack growth were studied in smooth four-point bend specimens using replication techniques. The mechanisms of crack initiation were interpreted in terms of fiber interactions.

Fatigue crack growth behavior for long cracks was studied on CT-specimens. The long crack growth data for stress ratios R = 0. 05 and 0. 5 were correlated by incorporating measured values of crack closure into an effective driving force, ΔK_eff.

Author Information

Preston, S

Swedish Institute for Metals Research, Stockholm, Sweden

Melander, A

Swedish Institute for Metals Research, Stockholm, Sweden

Groth, HL

The Royal Institute of Technology, Stockholm, Sweden

Blom, AF

The Royal Institute of Technology, Stockholm, Sweden

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Details

Developed by Committee: E08

Pages: 219–232

DOI: 10.1520/STP25402S

ISBN-EB: 978-0-8031-5138-3

ISBN-13: 978-0-8031-1385-5

Fatigue Crack Growth in an Al O Short Fiber Reinforced Al-2Mg Alloy

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