In this study, several austenitic stainless steels (UNS S30400, S30300, S30900, S31600, S31000 and N08330) were aluminized by halide activated pack cementation (HAPC) at 850°C for process times of 4, 9, 16 and 25 hours. Coating development and morphology dependence on austenite stability were investigated with respect to coating time. Cross-sections of the aluminized specimens were examined using optical and scanning electron microscopy (SEM). Surface phase identification was carried out by X-ray diffraction (XRD). Coating thickness measurements were recorded and the evolution of microstructures as a function of coating time was determined. Vickers microhardness profiles as a function of distance into the substrate were also obtained.

Subject
Scanning electron microscopy, X-ray diffraction, Stability, Coatings, Materials, Substrates, Nickel based alloys, Aluminum, Microhardness, Aluminides, Steel, Stainless steel, Austenite
Keywords:
aluminizing, austenite stainless steel, halide activated pack cementation, HAPC, coatings
© 2018 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2018
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.