Two test labs working for a seamless pipe manufacturer launched a test program to better evaluate the DCB test variability and to understand the factors of variation. The objective was to be able to give the same KISSC values independently of the testing lab. Testing labs A and B evaluated their initial differences through inter-laboratory testing, selected the factors of variations and used an original Taguchi design of experiment approach that allowed the investigation of a quite large number of factors within a limited number of tests. Among the selected factors, variations of the arm displacement within the NACE TM0177 limits explained nearly 70% of the observed variance.

Subject
Test methods, Materials, Piping, Manufacturing, Stirring, Saturation, Notches, Deviation, Partial pressures, Machining, Variability, Steel, Sulfide stress cracking
Keywords:
Sulfide Stress Cracking, SSC, Double Cantilever Beam, DCB, Carbon Steel, Low Alloy Steel, NACE TM0177, Test Methodology
© 2006 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).
2006
Association for Materials Protection and Performance (AMPP)
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