Hardness, chemical, and microstructural studies for laser-fabricated metal parts of graded materials

    Authors

    F. J. Kahlen; A. von Klitzing;A. Kar

    Abbreviated Journal Title

    J. Laser Appl.

    Keywords

    direct metal deposition; rapid manufacturing; graded materials; laser-fabricated metal parts; hardness testing; ductile metal parts; solidification; microstructure; ALUMINIDE; Materials Science, Multidisciplinary; Optics; Physics, Applied

    Abstract

    Laser deposition of metal layers has been recognized, in recent years, as a one-step process to fabricate metal parts instead of the two-step process of producing a mold and then using the mold to cast a metal part. The authors have employed this one-step technique to create graded materials by varying the part's composition from 100% stainless steel to a 100% nickel-based superalloy. Mechanical properties of these graded materials are measured and the effects of slow solidification rates are investigated. A multimode CO2 laser is operated at 270 W to produce wall-like structures of graded materials. The CO2 laser beam is focused to a spot size of 600 mu m using a 127 mm focal length lens. (C) 2000 Laser Institute of America. [S1042-346X(00)00405-8].

    Journal Title

    Journal of Laser Applications

    Volume

    12

    Issue/Number

    5

    Publication Date

    1-1-2000

    Document Type

    Article

    Language

    English

    First Page

    205

    Last Page

    209

    WOS Identifier

    WOS:000089921600007

    ISSN

    1042-346X

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