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Abstract

A 10 kW CO₂ continuous wave laser has been used to modify and refine the near surface microstructure of a ductile iron. The wear properties (evaluated by erosion, abrasion, and scratch tests) of the laser processed and unprocessed surfaces were studied. The wear resistance of laser processed samples is significantly enhanced by their refined austenitic microstructures and improved hardness in the melted and resolidified layer. The subsurface plastic deformation processes accompanying these wear tests are discussed. Cross-sectional scanning and transmission electron microscopy have been used to study the mechanism of wear particle generation. Subsurface microcrack generation and martensite formation from the mechanically metastable austenite matrix have been observed.

MST/702

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References

RABINOWICZ

: ‘Friction and wear of materials’, 109; 1965, New York, John Wiley.

MOORE

M. A.

: ‘Fundamentals of friction and wear of materials’, 73; 1981, Metals Park, OH, American Society for Metals.

ZumGAHR

K. H.

: Met. Frog., 1979, 116, (4), 46–52.

zumGAHR

K. H.

: Arch. Eisenhüttenwes., 1979, 50, 269–274.

KEAR

B. H.

, BREINAN

E. M.

, and GRUNWALD

L. E.

: in ‘Solidification and casting of metals’, Session 7, (ed. Davies

H. A.

), 501-509; 1979, London, The Metals Society.

‘Metals handbook’ , 9 edn, Vol. 1, 29, 86; 1978, Metals Park, OH, American Society for Metals.

CHEN

C. H.

: MS thesis, University of Illinois at Urbana-Champaign, 1984.

HAWKES

, WALKER

, STEEN

W. M.

, and WEST

D. R. F.

: in ‘Laser processing of materials’, (ed. Mukherjee

and Mazumder

), 169; 1985, Warrendale, PA, The Metallurgical Society of AIME.

TUCKER

T. R.

, CLAUER

A. H.

, WALTERS

C. T.

, and REAM

S. L.

: in ‘Lasers in metallurgy’, (ed. Mukherjee

and Mazumder

), 53; 1981, Warrendale, PA, The Metallurgical Society of AIME.

10.

ARKHIPOV

V. E.

, GRECHIN

A. N.

, and KHINA

M. L.

: Met. Sci. Heat Treat., 1980, 22, 248–250.

11.

SNEZHNOI

R. L.

, ZHUKOY

A. A.

, and KOKORA

A. N.

: Met. Sci. Heat Treat., 1980, 22, 900–901.

12.

CHEN

C. H.

, AursTErrok

C. J.

, and RIGSBEE

J. M.

: Metall. Trans., 1984, 15A, 719–728.

13.

CHEN

C. H.

, KESHAVAN

M. K.

, ALTSTETTER

C. J.

, and RIGSBEE

J. M.

: in ‘Laser processing of materials’, (ed. Mukherjee

and Mazumder

), 183; 1985, Warrendale, PA, The Metallurgical Society of AIME.

14.

CHEN

C. H.

: PhD thesis, University of Illinois at Urbana-Champaign, 1986.

Laser surface modification of ductile iron: Part 2 Wear mechanism

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