کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5013561 | 1462947 | 2017 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A focus on different factors affecting hydrogen induced cracking in oil and natural gas pipeline steel
ترجمه فارسی عنوان
تمرکز بر روی عوامل مختلف موثر بر ترک خوردگی ناشی از هیدروژن در خط لوله نفت و گاز طبیعی
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کلمات کلیدی
ورودی، بافت کریستالوگرافی، پراش پرتو الکترونی، طیف سنجی انرژی پراکنده،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
چکیده انگلیسی
In this research, hydrogen induced cracking (HIC) behavior of an API X70 pipeline steel has been studied. In order to create HIC cracks, an electrochemical hydrogen charging experiment was carried out on X70 steel by using 0.2Â M sulfuric acid and 3Â g/l ammonium thiocyanate for 8Â h. Moreover, SEM, EDS and EBSD techniques were used to characterize the as-received (AR) steel and investigate the different aspects of HIC phenomenon as well. The results showed that the inclusions and precipitates which play a key role in HIC phenomenon have been distributed randomly through the cross-section of tested steel. However, the concentration of them was higher at the center of cross-section than other areas. All HIC cracks initiated and propagated through the center of thickness where center segregation of elements has occurred. It is also observed that HIC cracks were initiated from several special types of inclusions and precipitates such as manganese sulphide and carbonitride precipitates. EBSD results showed that the dominant local texture of center of thickness in RD-TD plane was {001}//ND and {111}//ND. Moreover, HIC cracks propagate through differently oriented grains where the local texture is random.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Failure Analysis - Volume 79, September 2017, Pages 351-360
Journal: Engineering Failure Analysis - Volume 79, September 2017, Pages 351-360
نویسندگان
M.A. Mohtadi-Bonab, M. Eskandari,