Doctoral Dissertations


"This paper concentrates on the interfacial fracture energy or bond strength of laser deposited HI3 tool steel cladding/substrate system. For this four point bend test based on linear elastic fracture mechanics (LFEM) was carried out. Strain energy release rate, Gss which is closely related to bond strength of the interfacial region and the stress intensity factor, Kc were computed for this particular cladding/substrate system. In order to study the propagation of cracks during de-lamination of clad layer from substrate, optical and SEM graphs of the samples were taken. For laser clad HI3 tool steel clad/substrate system the fracture energy release rate, Gss and the stress intensity factor or fracture toughness, Kc of interface found to be 1.37*E+04 J/m2 and 39.8 MPam1/2 respectively. Such a high value of fracture energy obtained in the present study is an indicative of a strong cladding/substrate interface. Fracture energy or bonding strength for the laser cladded system is compared with similar weld cladded structures, to substantiate the advantage of laser cladding process in part repairing technology"--Abstract, page iv.


Liou, Frank W.

Committee Member(s)

Newkirk, Joseph William
Tsai, Hai-Lung


Mechanical and Aerospace Engineering

Degree Name

Ph. D. in Manufacturing Engineering


University of Missouri--Rolla

Publication Date

Fall 2005


viii, 17 pages

Note about bibliography

Includes bibliographical references (pages 15-16).


© 2005 Hari Janardanan Nair, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type




Subject Headings

Metal cladding -- Reliability
Laser beams -- Industrial applications
Strength of materials -- Evaluation
Fracture mechanics

Thesis Number

T 8907

Print OCLC #


Link to Catalog Record

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