Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/211777

Title

Thermal fatigue behavior of direct metal deposited H13 tool steel coating on copper alloy substrate

Author(s)

Imran, M. Khalid;  Masood, S. H.;  Brandt, Milan;  Bhattacharya, Sudip;  Gulizia, Stefan;  Jahedi, Mahnaz;  Mazumder, Jyotirmoy

Abstract

Thermal fatigue performance of direct metal deposited H13 tool steel coating on copper alloy substrate was investigated for high pressure die casting applications. An innovative thermal fatigue test rig was used which is capable of applying cyclic identical energy on the test materials regardless of thermal conductivity property. H13 tool steel was coated on cylindrical copper alloy core material both directly as well as using 316 stainless steel as a buffer layer to evaluate and compare their thermal fatigue properties. Two types of cracks at the surface of both coatings were observed and investigated. The network of small and shallow cracks on the surface was the result of thermal stress while the large catastrophic cracks were believed to be the consequence of thermal stress coupled with the thermal expansion mismatch between the H13 tool steel coating and copper alloy core materials. The H13 tool steel, coated with 316 stainless steel showed much less number of cracks compared to the directly coated H13 tool steel indicating superior thermal fatigue resistance. Moreover the first layer of the directly coated H13 tool steel showed vulnerable behavior under high temperature application showing numerous cracks. Both coatings showed no crack propagation along the interface between coatings and the substrate materials.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Industrial Research Institute Swinburne

Source

Surface and Coatings Technology, Vol. 206, no. 8-9 (Jan 2012), pp. 2572-2580

Publication year

2012

FOR Code(s)

0204 Condensed Matter Physics;  0306 Physical Chemistry (Incl. Structural);  0912 Materials Engineering

Keyword(s)

Direct metal deposition;  Scanning electron microscopy;  Steel coating;  Thermal fatigue;  X-ray diffraction

Publisher

Elsevier

ISSN

0257-8972

Publisher URL

http://dx.doi.org/10.1016/j.surfcoat.2011.11.016

Copyright

Copyright © 2011 Published by Elsevier B.V.

Peer reviewed