Interfacial fracture energy (bonding strength) of laser deposited H13 tool steel on H13 tool steel substrate using four point bend test

Author

Hari Janardanan Nair

Abstract

"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, G_ss which is closely related to bond strength of the interfacial region and the stress intensity factor, K_c 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, G_ss and the stress intensity factor or fracture toughness, K_c of interface found to be 1.37*E+04 J/m² and 39.8 MPam^1/2 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.

Advisor(s)

Liou, Frank W.

Committee Member(s)

Newkirk, Joseph William
Tsai, Hai-Lung

Department(s)

Mechanical and Aerospace Engineering

Degree Name

Ph. D. in Manufacturing Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 2005

Pagination

viii, 17 pages

Note about bibliography

Includes bibliographical references (pages 15-16).

Rights

© 2005 Hari Janardanan Nair, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Subject Headings

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

Thesis Number

T 8907

Print OCLC #

82457067

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

Recommended Citation

Nair, Hari Janardanan, "Interfacial fracture energy (bonding strength) of laser deposited H13 tool steel on H13 tool steel substrate using four point bend test" (2005). Doctoral Dissertations. 1656.
https://scholarsmine.mst.edu/doctoral_dissertations/1656