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Morphology-Dependent Hardness of Cr7C3-Ni-Rich Alloy Composite vs Orientation Independent Hardness of Cr7C3 Primary Phase in a Laser Clad Microstructure
Int Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, India.
Int Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, India.
Int Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, India.
Drexel Univ, Dept Mat Engn, Philadelphia, PA 19104 USA.
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2017 (English)In: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 48A, no 4, 1534-1539 p.Article in journal (Refereed) Published
Abstract [en]

Microstructural evolution with superheating was studied in chromium carbide-nickel coatings deposited by laser cladding. At lower superheating, selective growth of aOE (c) 0001 > direction from the high density of Cr7C3 grains nucleated resulted in a columnar structure with (0001) texture. Increased superheating lead to the loss of columnar structure as well as the (0001) texture. The hexagonal Cr7C3 showed an unusual isotropic nanoindentation hardness evidently correlated with its low c/a ratio. However, the rod-like morphology of the carbide dendrites resulted in significant anisotropy in the hardness of the composite.

Place, publisher, year, edition, pages
SPRINGER , 2017. Vol. 48A, no 4, 1534-1539 p.
Keyword [en]
SINGLE-CRYSTALS; EQUIAXED TRANSITION; STAINLESS-STEEL; TI-ALLOY; ANISOTROPY; NANOINDENTATION; GROWTH; ALPHA-SI3N4; MICROSCOPY; COATINGS
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-10928DOI: 10.1007/s11661-017-3984-2ISI: 000396057300004Scopus ID: 2-s2.0-85012115668OAI: oai:DiVA.org:hv-10928DiVA: diva2:1136153
Available from: 2017-08-25 Created: 2017-08-25 Last updated: 2017-09-20Bibliographically approved

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Joshi, Shrikant V.

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Division of Subtractive and Additive ManufacturingResearch Enviroment Production Technology West
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