Morphology-Dependent Hardness of Cr7C3-Ni-Rich Alloy Composite vs Orientation Independent Hardness of Cr7C3 Primary Phase in a Laser Clad Microstructure

Venkatesh, Lakshmi NarayananInt Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, India (författare)

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.

TEKNIK OCH TEKNOLOGIER Materialteknik Bearbetnings-, yt- och fogningsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Manufacturing, Surface and Joining Technology hsv//eng
SINGLE-CRYSTALS; EQUIAXED TRANSITION; STAINLESS-STEEL; TI-ALLOY; ANISOTROPY; NANOINDENTATION; GROWTH; ALPHA-SI3N4; MICROSCOPY; COATINGS
Manufacturing and materials engineering
Produktions- och materialteknik

Babu, Pitchuka SureshInt Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, India (författare)
Gundakaram, Ravi ChandraInt Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, India (författare)
Doherty, Roger D.Drexel Univ, Dept Mat Engn, Philadelphia, PA 19104 USA (författare)
Joshi, Shrikant V.,1960-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW(Swepub:hv)shrjos (författare)
Samajdar, IndradevIndian Inst Technol, Dept Met Engn & Mat Sci, Mumbai 400076, Maharashtra, India (författare)
Int Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, IndiaDrexel Univ, Dept Mat Engn, Philadelphia, PA 19104 USA (creator_code:org_t)

Ingår i:Metallurgical and Materials Transactions. A: Springer Science and Business Media LLC48A:4, s. 1534-15391073-56231543-1940

Av författaren/redakt...: Venkatesh, Laksh ...; Babu, Pitchuka S ...; Gundakaram, Ravi ...; Doherty, Roger D ...; Joshi, Shrikant ...; Samajdar, Indrad ...

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