STP733

    Microstructural Origin of Flutes and Their Use in Distinguishing Striationless Fatigue Cleavage from Stress-Corrosion Cracking in Titanium Alloys

    Published: Jan 1981


      Format Pages Price  
    PDF Version (912K) 27 $25   ADD TO CART
    Complete Source PDF (14M) 27 $55   ADD TO CART


    Abstract

    Postfracture analysis does not always distinguish striationless low-stress fatigue from stress-corrosion cracking (SCC), since both are characterized by cleavage, together with other less distinct fracture modes. Studies of identical specimens of Ti-8Al-1Mo-1V broken under both conditions suggest that the presence of certain microplastic fracture features called flutes may be uniquely characteristic of SCC, and absent from low-stress striationless fatigue fractures. Some new observations concerning the microstructural origins of flutes verify that they arise from a tendency toward planar slip in α and α-β alloys and from the presence of multiple cleavage during crack propagation under certain circumstances, including SCC.

    Keywords:

    titanium alloys, stress-corrosion cracking, fatigue, fractography, fracture mechanisms, cleavage, flutes, hydrogen embrittlement, sustained load cracking, materials science, materials


    Author Information:

    Meyn, DA
    Metallurgists Naval Research Laboratory, Washington, D.C.,

    Brooks, EJ
    Metallurgists Naval Research Laboratory, Washington, D.C.,


    Paper ID: STP33421S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP33421S


    CrossRef ASTM International is a member of CrossRef.