Volume 20, Issue 9 (September 2020)
Modares Mechanical Engineering 2020, 20(9): 2377-2388 |
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Hashemi H, Hashemi S. Investigation of Seam Weld and Steel Base Metal Fracture Energy of API X65 Pipe Using Three-Point Bending Experimental. Modares Mechanical Engineering 2020; 20 (9) :2377-2388
URL: http://mme.modares.ac.ir/article-15-40564-en.html
URL: http://mme.modares.ac.ir/article-15-40564-en.html
1- Mechanical Engineering Department, Engineering Faculty, University of Birjand, Birjand, Iran
2- Mechanical Engineering Department, Engineering Faculty, University of Birjand, Birjand, Iran ,shhashemi@birjand.ac.ir
2- Mechanical Engineering Department, Engineering Faculty, University of Birjand, Birjand, Iran ,
Abstract: (1682 Views)
Because of the inherent structure of welded pipelines, the seam weld can be a potential source for initiation and propagation of crack that can eventually lead to failure of the structure. Due to the critical conditions in the welding region, the investigation of failure energy in gas transportation pipeline is very important for engineers and line designers. In this paper, the three-point bending test (according to the standard specimen of drop-weight tear test) was performed quasi-statically on the seam weld pipe and base metal of spiral seam weld pipe of API X65 steel from which force diagrams were extracted. The presence of sudden load drops in the force-displacement diagram of the specimen in the weld indicated the inhomogeneous structure of the weld. The diagrams of force-displacement, yield and ultimate force, amount of steady crack growth and fracture energy of the metal and seam weld specimens including initiation and propagation energy of crack were investigated and compared. Also, the ratio of the force drop to the ultimate force at the same displacement rate was investigated. The results showed that in seam weld compared to the base metal specimen, the yield force was higher and the ultimate force, the amount of steady crack, initiation and propagation energy of crack were lower. In addition, the lower ratio of force to ultimate force (at the same displacement) in the base metal also indicated a high resistance of the base to the crack propagation.
Keywords: Gas Transportation Pipeline, API X65 Steel, Three-Point Bending Test, Seam Weld, Fracture Energy
Article Type: Original Research |
Subject:
Welding
Received: 2020/02/9 | Accepted: 2020/07/15 | Published: 2020/09/20
Received: 2020/02/9 | Accepted: 2020/07/15 | Published: 2020/09/20
References
1. Demofonti G, Mannicci G, Spinelli CM, Barsanti L, Hillenbrand HG. Large diameter X100 gas linepipes: fracture propagation evaluation by full-scale burst test. Pipeline Technology. 2000;1:509-520. [Link]
2. El-Danaf E, Baig M, Almajid A, Alshalfan W, Al-Mojil M, Al-Shahrani S. Mechanical microstructure and texture characterization of API X65 steel. Materials and Design. 2013;47:529-538. [Link] [DOI:10.1016/j.matdes.2012.12.031]
3. Chen X, Lu H, Chen G, Wang X. A Comparison between fracture toughness at different locations of longitudinal submerged arc welded and spiral submerged arc welded joints of API X80 pipeline steels. Engineering Fracture Mechanics. 2015;148:110-121. [Link] [DOI:10.1016/j.engfracmech.2015.09.003]
4. Hashemi SH, Sabokrouh M, Farahani MR. Investigation of weldability in multi-pass girth welding of thermomechanical steel pipe. Modares Mechanical Engineering. 2013;13(4):60-73. [Persian] [Link]
5. Jenney C, Brien A. Welding Handbook. Miami: American Welding Society;1987. [Link]
6. Hashemi SH, Mohammadyani D. Characterisation of weldment hardness, impact energy and microstructure in API X65 steel. International Journal of Pressure Vessels and Piping. 2012;98:8-15. [Link] [DOI:10.1016/j.ijpvp.2012.05.011]
7. Hashemi H, Hashemi SH. Investigation of macroscopic fracture surface characteristics of API X65 steel using three-point bending test. Modares Mechanical Engineering. 2019;19(7):1591-1600. [Persian] [Link]
8. Majidi-Jirandehi AA, Hashemi SH. Study of macroscopic fracture surface characteristics of spiral welded API X65 gas transportation pipeline steel. Modares Mechanical Engineering. 2018;17(11):219-228. [Persian] [Link]
9. Hashemi SH. Correction factors for safe performance of API X65 pipeline steel. International Journal of Pressure Vessels and Piping. 2009;86(8):533-540. [Link] [DOI:10.1016/j.ijpvp.2009.01.011]
10. Asghari V, Choupani N, Hanifi M. CVN-KJC correlation model for API X65 gas pipeline. Engineering Failure Analysis. 2017;79:51-63. [Link] [DOI:10.1016/j.engfailanal.2017.04.007]
11. Aucott L, Wen SW, Dong H. The role of Ti carbonitride precipitates on fusion zone strength-toughness in submerged arc welded linepipe joints. Materials Science & Engineering: A. 2015;622:194-203. [Link] [DOI:10.1016/j.msea.2014.10.057]
12. Rudland DL, Wang YY, Wilkowski G, Horsley DJ. Characterizing dynamic fracture toughness of linepipe steels using the pressed-notch drop-weight-tear test specimen. Engineering Fracture Mechanics. 2004;71(16-17):2533-2549. [Link] [DOI:10.1016/j.engfracmech.2003.12.007]
13. Fang J, Zhang J, Wang L. Evaluation of cracking behavior and critical CTOA values of pipeline steel from DWTT specimens. Engineering Fracture Mechanics. 2014;124-125:18-29. [Link] [DOI:10.1016/j.engfracmech.2014.04.031]
14. Simha CHM, Xu S, Tyson WR. Non-local phenomenological damage-mechanics-based modeling of the drop-weight tear test. Engineering Fracture Mechanics. 2014;118:62-88. [Link] [DOI:10.1016/j.engfracmech.2014.01.009]
15. Farrahi A. Experimental evaluation of fracture toughness in spiral weld of thermomechanical steel pipe. Journal of Solid and Fluid Mechanics. 2013;2(4):25-35. [Persian] [Link]
16. American petroleum institute. API RP 5L3: Recommended practice for conducting drop-weight tear tests on line pipe [Internet]. Washington: API; 2014 [Cited 2014 1 8] Available From: https://www.techstreet.com/standards/api-rp5l3?product_id=1881831. [Link]
17. American petroleum institute. API specification 5L/ISO 3183 (Modified), specification for line pipe. Washington: API; 2007. Unknown Cited and Cite. [Link]
18. Majidi Jirandehi AA, Hashemi SH. Weld metal fracture characterization of API X65 steel using drop weight tear test. Materials Research Express. 2019;6(1):016552. [Link] [DOI:10.1088/2053-1591/aae797]
19. Pereira LDS, Moco RF, Bolognesi Donatoa GH. Ductile fracture of advanced pipeline steels: study of stress states and energies in dynamic impact specimens - CVN and DWTT. Procedia Structural Integrity. 2018; 13:1985-1992. [Link] [DOI:10.1016/j.prostr.2018.12.219]
20. Shin S, Hwang B, Lee S, Kang KB. Effects of notch shape and specimen thickness on drop-weight tear test properties of API X70 and X80 line-pipe steels. Metallurgical and Materials Transactions A. 2007;38(3):537-551. [Link] [DOI:10.1007/s11661-006-9073-6]
21. Rudland DL, Wilkowski GM, Feng Z, Wang YY, Horsley D, Glover A. Experimental investigation of CTOA in linepipe steels. Engineering Fracture Mechanics. 2003;70(3-4):567-577. [Link] [DOI:10.1016/S0013-7944(02)00138-8]
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