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Indexed by:期刊论文

Date of Publication:2011-11-01

Journal:APPLIED SURFACE SCIENCE

Included Journals:Scopus、SCIE、EI

Volume:258

Issue:2

Page Number:700-704

ISSN No.:0169-4332

Key Words:Cold spraying; Mechanical property; 304 stainless steel coatings; Microstructure; Annealing treatment

Abstract:In this study, 304 stainless steel coatings were deposited on interstitial-free steel substrate by cold spraying method. The effect of annealing treatment on microstructure, microhardness, ultimate tensile strength and fracture performance of the coatings were studied. The results showed that annealing treatment had made a dominant contribution to heal up the incomplete interfaces between the deposited particles. Both of the microstructure and the mechanical properties have been obviously optimized by annealing treatment. In addition, the coating microhardness decreased from 345 HV(0.2) for the as-sprayed coating to 201 HV(0.2) for the annealed coating. The coating ultimate tensile strength increased from 65 MPa for the as-sprayed coating to 357 MPa for the annealed coating, which resulted from the increase of the metallurgically bonded areas in the coating induced by annealing treatment. Fracture morphology of the coatings also revealed that annealing treatment changed the fracture character of the cold sprayed 304 stainless steel coating from brittle type to plastic type. (C) 2011 Elsevier B.V. All rights reserved.