STP1080

    Fatigue Crack Growth in an Al2O3 Short Fiber Reinforced Al-2Mg Alloy

    Published: Jan 1990


      Format Pages Price  
    PDF Version (476K) 14 $25   ADD TO CART
    Complete Source PDF (4.8M) 14 $68   ADD TO CART


    Abstract

    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, ΔKeff.

    Keywords:

    composite materials, thermal properties, mechanical properties, metal matrix composites, fatigue (materials), fatigue cracks, fatigue threshold, fibers, aluminum, fracture toughness, crack initiation


    Author Information:

    Preston, S
    Specialist and head, Swedish Institute for Metals Research, Stockholm,

    Melander, A
    Specialist and head, Swedish Institute for Metals Research, Stockholm,

    Groth, HL
    Senior research engineer and professor, The Royal Institute of Technology, Stockholm,

    Blom, AF
    Senior research engineer and professor, The Royal Institute of Technology, Stockholm,


    Paper ID: STP25402S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP25402S


    CrossRef ASTM International is a member of CrossRef.