Many of the failures in nickel and nickel base alloys can be related to special but as yet not understood compositional features of surfaces and grain boundaries. Compositional differences occur as a result of solute (and/or impurity) segregation or precipitation (1, 2, 3). For example, it is possible that impurities at the ppm level in the matrix can be enriched by factors of 103 ~ 104 at grain boundaries and surfaces during heat treatment or thermal processing.

Subject
Sulfur, Materials, Metal surfaces, Fracture surfaces, Argon, Anode surfaces, Impurities, Specimen preparation, Carbon, Nickel, Fracture, Grain boundary, Grain
© 1977 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).
1977
Association for Materials Protection and Performance (AMPP)
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