The effect of thermomechanical processing on the tensile, fatigue, and creep behavior of magnesium alloy AM60

Z. Chen, J. Huang, R. F. Decker, S. E. Lebeau, L. R. Walker, O. B. Cavin, T. R. Watkins, C. J. Boehlert

    Research output: Contribution to journalArticle

    • 8 Citations

    Abstract

    Tensile, fatigue, fracture toughness, and creep experiments were performed on a commercially available magnesium-aluminum alloy (AM60) after three processing treatments: (1) as-THIXOMOLDED (as-molded), (2) THIXOMOLDED then thermomechanically processed (TTMP), and (3) THIXOMOLDED then TTMP then annealed (annealed). The TTMP procedure resulted in a significantly reduced grain size and a tensile yield strength greater than twice that of the as-molded material without a debit in elongation to failure (ε f ). The as-molded material exhibited the lowest strength, while the annealed material exhibited an intermediate strength but the highest ε f (>1 pct). The TTMP and annealed materials exhibited fracture toughness values almost twice that of the as-molded material. The as-molded material exhibited the lowest fatigue threshold values and the lowest fatigue resistance. The annealed material exhibited the greatest fatigue resistance, and this was suggested to be related to its balance of tensile strength and ductility. The fatigue lives of each material were similar at both room temperature (RT) and 423 K (150 °C). The tensile-creep behavior was evaluated for applied stresses ranging between 20 and 75 MPa and temperatures between 373 and 473 K (100 and 200 °C). During both the fatigue and creep experiments, cracking preferentially occurred at grain boundaries. Overall, the results indicate that thermomechanical processing of AM60 dramatically improves the tensile, fracture toughness, and fatigue behavior, making this alloy attractive for structural applications. The reduced creep resistance after thermomechanical processing offers an opportunity for further research and development.

    Original languageEnglish (US)
    Pages (from-to)1386-1399
    Number of pages14
    JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
    Volume42
    Issue number5
    DOIs
    StatePublished - May 2011

    Profile

    Endometrial Hyperplasia
    Traffic Accidents
    Fatigue of materials
    fracture strength
    Accessory Nerve
    Creep
    magnesium alloys
    Immunoglobulin A
    Fracture toughness
    Common Bile Duct Diseases
    Acetanilides
    Metronidazole
    tensile creep
    creep strength
    fatigue life
    yield strength
    research and development
    ductility
    aluminum alloys
    tensile strength

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Metals and Alloys
    • Mechanics of Materials

    Cite this

    The effect of thermomechanical processing on the tensile, fatigue, and creep behavior of magnesium alloy AM60. / Chen, Z.; Huang, J.; Decker, R. F.; Lebeau, S. E.; Walker, L. R.; Cavin, O. B.; Watkins, T. R.; Boehlert, C. J.

    In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 42, No. 5, 05.2011, p. 1386-1399.

    Research output: Contribution to journalArticle

    Chen, Z.; Huang, J.; Decker, R. F.; Lebeau, S. E.; Walker, L. R.; Cavin, O. B.; Watkins, T. R.; Boehlert, C. J. / The effect of thermomechanical processing on the tensile, fatigue, and creep behavior of magnesium alloy AM60.

    In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 42, No. 5, 05.2011, p. 1386-1399.

    Research output: Contribution to journalArticle

    @article{77bd4a464c9d4164b68dcab8826d0340,
    title = "The effect of thermomechanical processing on the tensile, fatigue, and creep behavior of magnesium alloy AM60",
    abstract = "Tensile, fatigue, fracture toughness, and creep experiments were performed on a commercially available magnesium-aluminum alloy (AM60) after three processing treatments: (1) as-THIXOMOLDED (as-molded), (2) THIXOMOLDED then thermomechanically processed (TTMP), and (3) THIXOMOLDED then TTMP then annealed (annealed). The TTMP procedure resulted in a significantly reduced grain size and a tensile yield strength greater than twice that of the as-molded material without a debit in elongation to failure (ε f ). The as-molded material exhibited the lowest strength, while the annealed material exhibited an intermediate strength but the highest ε f (>1 pct). The TTMP and annealed materials exhibited fracture toughness values almost twice that of the as-molded material. The as-molded material exhibited the lowest fatigue threshold values and the lowest fatigue resistance. The annealed material exhibited the greatest fatigue resistance, and this was suggested to be related to its balance of tensile strength and ductility. The fatigue lives of each material were similar at both room temperature (RT) and 423 K (150 °C). The tensile-creep behavior was evaluated for applied stresses ranging between 20 and 75 MPa and temperatures between 373 and 473 K (100 and 200 °C). During both the fatigue and creep experiments, cracking preferentially occurred at grain boundaries. Overall, the results indicate that thermomechanical processing of AM60 dramatically improves the tensile, fracture toughness, and fatigue behavior, making this alloy attractive for structural applications. The reduced creep resistance after thermomechanical processing offers an opportunity for further research and development.",
    author = "Z. Chen and J. Huang and Decker, {R. F.} and Lebeau, {S. E.} and Walker, {L. R.} and Cavin, {O. B.} and Watkins, {T. R.} and Boehlert, {C. J.}",
    year = "2011",
    month = "5",
    doi = "10.1007/s11661-010-0478-x",
    volume = "42",
    pages = "1386--1399",
    journal = "Metallurgical Transactions A (Physical Metallurgy and Materials Science)",
    issn = "1073-5623",
    publisher = "Springer Boston",
    number = "5",

    }

    TY - JOUR

    T1 - The effect of thermomechanical processing on the tensile, fatigue, and creep behavior of magnesium alloy AM60

    AU - Chen,Z.

    AU - Huang,J.

    AU - Decker,R. F.

    AU - Lebeau,S. E.

    AU - Walker,L. R.

    AU - Cavin,O. B.

    AU - Watkins,T. R.

    AU - Boehlert,C. J.

    PY - 2011/5

    Y1 - 2011/5

    N2 - Tensile, fatigue, fracture toughness, and creep experiments were performed on a commercially available magnesium-aluminum alloy (AM60) after three processing treatments: (1) as-THIXOMOLDED (as-molded), (2) THIXOMOLDED then thermomechanically processed (TTMP), and (3) THIXOMOLDED then TTMP then annealed (annealed). The TTMP procedure resulted in a significantly reduced grain size and a tensile yield strength greater than twice that of the as-molded material without a debit in elongation to failure (ε f ). The as-molded material exhibited the lowest strength, while the annealed material exhibited an intermediate strength but the highest ε f (>1 pct). The TTMP and annealed materials exhibited fracture toughness values almost twice that of the as-molded material. The as-molded material exhibited the lowest fatigue threshold values and the lowest fatigue resistance. The annealed material exhibited the greatest fatigue resistance, and this was suggested to be related to its balance of tensile strength and ductility. The fatigue lives of each material were similar at both room temperature (RT) and 423 K (150 °C). The tensile-creep behavior was evaluated for applied stresses ranging between 20 and 75 MPa and temperatures between 373 and 473 K (100 and 200 °C). During both the fatigue and creep experiments, cracking preferentially occurred at grain boundaries. Overall, the results indicate that thermomechanical processing of AM60 dramatically improves the tensile, fracture toughness, and fatigue behavior, making this alloy attractive for structural applications. The reduced creep resistance after thermomechanical processing offers an opportunity for further research and development.

    AB - Tensile, fatigue, fracture toughness, and creep experiments were performed on a commercially available magnesium-aluminum alloy (AM60) after three processing treatments: (1) as-THIXOMOLDED (as-molded), (2) THIXOMOLDED then thermomechanically processed (TTMP), and (3) THIXOMOLDED then TTMP then annealed (annealed). The TTMP procedure resulted in a significantly reduced grain size and a tensile yield strength greater than twice that of the as-molded material without a debit in elongation to failure (ε f ). The as-molded material exhibited the lowest strength, while the annealed material exhibited an intermediate strength but the highest ε f (>1 pct). The TTMP and annealed materials exhibited fracture toughness values almost twice that of the as-molded material. The as-molded material exhibited the lowest fatigue threshold values and the lowest fatigue resistance. The annealed material exhibited the greatest fatigue resistance, and this was suggested to be related to its balance of tensile strength and ductility. The fatigue lives of each material were similar at both room temperature (RT) and 423 K (150 °C). The tensile-creep behavior was evaluated for applied stresses ranging between 20 and 75 MPa and temperatures between 373 and 473 K (100 and 200 °C). During both the fatigue and creep experiments, cracking preferentially occurred at grain boundaries. Overall, the results indicate that thermomechanical processing of AM60 dramatically improves the tensile, fracture toughness, and fatigue behavior, making this alloy attractive for structural applications. The reduced creep resistance after thermomechanical processing offers an opportunity for further research and development.

    UR - http://www.scopus.com/inward/record.url?scp=79954433809&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=79954433809&partnerID=8YFLogxK

    U2 - 10.1007/s11661-010-0478-x

    DO - 10.1007/s11661-010-0478-x

    M3 - Article

    VL - 42

    SP - 1386

    EP - 1399

    JO - Metallurgical Transactions A (Physical Metallurgy and Materials Science)

    T2 - Metallurgical Transactions A (Physical Metallurgy and Materials Science)

    JF - Metallurgical Transactions A (Physical Metallurgy and Materials Science)

    SN - 1073-5623

    IS - 5

    ER -