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06126 UNDERSTANDING AND CONTROLLING VARIATIONS IN DCB TEST RESULTS

Picture for 06126 UNDERSTANDING AND CONTROLLING VARIATIONS
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Product Number: 51300-06126-SG
ISBN: 06126 2006 CP
Author: P. Sutter, J. Leyer, H. Marchebois, C. Bosch, E. Wanzenberg, A. Kulgemeyer, B.J. Orlans-Joliet
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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 K ISSC 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.

Keywords: Sulfide Stress Cracking, SSC, Double Cantilever Beam, DCB, Carbon Steel, Low Alloy Steel, NACE TM0177, Test Methodology
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 K ISSC 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.

Keywords: Sulfide Stress Cracking, SSC, Double Cantilever Beam, DCB, Carbon Steel, Low Alloy Steel, NACE TM0177, Test Methodology
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