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Title

Statistical Approach on Corrosion Behavior of Dissimilar Welds of A۳۸۷-Gr۹۱/AISI۳۱۶ Steels with PCGTAW Process

فصلنامه مواد پیشرفته و فرآوری، دوره: 5، شماره: 1
Year: 1396
COI: JR_JMATPR-5-1_001
Language: EnglishView: 30
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Authors

Mohammad Jula - M. Sc. Student, Department of Materials Science and Engineering, Shahid Chamran university of Ahvaz, Ahvaz, Iran
Reza Dehmolaei - Department of Material Science and Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Seyed Reza Alavi Zaree - Department of Material Science and Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Abstract:

In this study, an attempt was made to minimize the corrosion rate and maximize pitting potential of dissimilar metal welded joints of A۳۸۷-Gr۹۱/AISI۳۱۶ steels. Process parameters of the pulsed current gas tungsten arc welding (PCGTAW) including of peak current (P), background current (B), pulse frequency (F), and on time percentage (O) were chosen as the influencing factors on corrosion behavior. Design of Experiments (DOE) were done using Taguchi’s L۹ (۳۴) orthogonal array. Signal to noise (S/N) ratio Analysis indicated that corrosion rate was affected by peak current, frequency, on time percentage, and background current whereas pitting potential was mostly influenced by on time percentage, peak current, frequency, and background current, respectively. Optimum conditions of P, B, F, and O factors were found as ۱۳۵A, ۷۵A, ۱۰Hz, ۸۰% for Corrosion rate and ۱۲۰A, ۶۰A, ۶Hz, ۶۰% for pitting potential, respectively. Furthermore, analysis of variance (ANOVA) demonstrated that the contribution of P, B, F, and O were ۲۸.۷۹%, ۱۳.۰۶%, ۲۸.۶۳%, and ۲۹.۵۱% for corrosion rate and ۱۳.۹۷%, ۲.۷۹%, ۱۲.۲۰%, and ۷۱.۰۴% for pitting potential, respectively. Results from welded samples at optimum conditions, showed good agreement with predicted values for corrosion rate and pitting potential.

Keywords:

Taguchi method , analysis of variance (ANOVA) , Pulsed current gas tungsten arc welding (PCGTAW) , A۳۸۷-Gr.۹۱ , AISI۳۱۶

Paper COI Code

This Paper COI Code is JR_JMATPR-5-1_001. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1282710/

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If you want to refer to this Paper in your research work, you can simply use the following phrase in the resources section:
Jula, Mohammad and Dehmolaei, Reza and Alavi Zaree, Seyed Reza,1396,Statistical Approach on Corrosion Behavior of Dissimilar Welds of A۳۸۷-Gr۹۱/AISI۳۱۶ Steels with PCGTAW Process,https://civilica.com/doc/1282710

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Type of center: دانشگاه دولتی
Paper count: 17,260
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