Case studies in engineering failure analysis最新文献_第4页

Root cause analysis (RCA) of fractured ASTM A53 carbon steel pipe at oil & gas company 油气公司ASTM A53碳钢管道断裂的根本原因分析(RCA)

Case studies in engineering failure analysis Pub Date : 2016-10-01 DOI: 10.1016/j.csefa.2016.04.002

M.A. Khattak , N. Zareen , Anique Mukhtar , S. Kazi , Amena Jalil , Zaheer Ahmed , Miraj Muhammad Jan

{"title":"Root cause analysis (RCA) of fractured ASTM A53 carbon steel pipe at oil & gas company","authors":"M.A. Khattak , N. Zareen , Anique Mukhtar , S. Kazi , Amena Jalil , Zaheer Ahmed , Miraj Muhammad Jan","doi":"10.1016/j.csefa.2016.04.002","DOIUrl":"10.1016/j.csefa.2016.04.002","url":null,"abstract":"<div><p>Incident involving failures of ASTM A53 carbon steel (CS) pipe, connected to pressure safety valve (PSV) and carrying raw gas has caused serious supply disruption. This study was performed to identify the most probable cause of the pipe failure. It was conducted by reviewing the existing design, construction data and pipe material analysis using non-destructive techniques such as VT, PT, MT and UT along with metallographic, hardness and microscopic analysis. The investigation revealed that excessive material loss has occurred in both failure and its adjacent regions due to abrasive grinding, resulting in the formation of a through thickness flaw. These grindings were performed to accommodate the pre-installed piping spool to avoid alteration in the pipe position. RCA demonstrated that this rapid thinning of the steel pipe body later led to its failure. Metallurgical study using photomicrograph shows that the morphology of the steel material was consistent and did not show any evidence of internal corrosion or micro fractures. Further damage to the surface of already excessively reduced thickness occurred due to nominal pipe vibration and atmospheric effect during service. The research work described in the paper has a significant meaning to recognize the root cause of such failures in CS pipes and through given recommendations to eliminate future such happenings.</p></div>","PeriodicalId":91224,"journal":{"name":"Case studies in engineering failure analysis","volume":"7 ","pages":"Pages 1-8"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csefa.2016.04.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54177215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Metallurgical failure analysis of a cracked aluminum 7075 wing internal angle 7075铝合金机翼内角裂纹的冶金失效分析

Case studies in engineering failure analysis Pub Date : 2016-10-01 DOI: 10.1016/j.csefa.2016.05.001

Morteza Soltani Tajabadi

引用次数: 7

Failure analysis of a diesel generator connecting rod 柴油发电机连杆失效分析

Case studies in engineering failure analysis Pub Date : 2016-10-01 DOI: 10.1016/j.csefa.2016.06.001

C. Juarez , F. Rumiche , A. Rozas , J. Cuisano , P. Lean

{"title":"Failure analysis of a diesel generator connecting rod","authors":"C. Juarez , F. Rumiche , A. Rozas , J. Cuisano , P. Lean","doi":"10.1016/j.csefa.2016.06.001","DOIUrl":"10.1016/j.csefa.2016.06.001","url":null,"abstract":"<div><p>This paper presents the results of a failure analysis investigation conducted in a connecting rod from a diesel engine used in the generation of electrical energy. The investigation included an extensive analysis of the con-rod material as well as the fracture zone. The investigation involved the following experimental procedures and testing techniques: visual inspection, fractography, magnetic particle inspection, chemical analysis, tensile and hardness testing, metallography, and microanalysis. The connecting rod was fabricated from an AISI/SAE 4140 low alloy steel; chemical composition, mechanical properties and microstructure were appropriate for the application. The connecting rod fractured at the body in a section close to the head; the origin of the fracture was located at the con-rod lubrication channel. The lubrication channel exhibited an area containing a tungsten based material, presumably from a machining tool, embedded in its surface as a result of a deficient manufacturing process. This area acted as nucleation site for cracks that propagate through the connecting rod section by a fatigue mechanism, reducing its section and finally producing its catastrophic failure.</p></div>","PeriodicalId":91224,"journal":{"name":"Case studies in engineering failure analysis","volume":"7 ","pages":"Pages 24-31"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csefa.2016.06.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54177240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

Analysis of the failure of an offshore compressor crankshaft 海上压缩机曲轴故障分析

Case studies in engineering failure analysis Pub Date : 2016-10-01 DOI: 10.1016/j.csefa.2016.07.001

William Harris, Keith Birkitt

引用次数: 8

Damage analysis of choke bean used in an oil–gas well 某油气井节流豆的损伤分析

Case studies in engineering failure analysis Pub Date : 2016-10-01 DOI: 10.1016/j.csefa.2016.08.001

H.M. Tawancy, Luai M. Alhems

引用次数: 2

Research on the failure of the induced draft fan's shaft in a power boiler 某电厂锅炉引风机轴的失效研究

Case studies in engineering failure analysis Pub Date : 2016-04-01 DOI: 10.1016/j.csefa.2016.02.002

Jinfeng Du, Jun Liang, Lei Zhang

引用次数: 12

Failure analysis of mixed mode crack growth in heavy duty truck frame rail 重型汽车车架钢轨混合模裂纹扩展失效分析

Case studies in engineering failure analysis Pub Date : 2016-04-01 DOI: 10.1016/j.csefa.2016.03.002

Vinay N. Rao, Jeffrey W. Eischen

引用次数: 11

Case study of severe strip breakage in rolling mill of Thin Slab Casting and Rolling (TSCR) shop of TATA Steel, Jamshedpur 贾姆谢德布尔塔塔钢铁公司薄板坯连轧(TSCR)车间轧钢机严重带钢断裂案例分析

Case studies in engineering failure analysis Pub Date : 2016-04-01 DOI: 10.1016/j.csefa.2015.11.002

Diptak Bhattacharya, Avinash Mishra, Ganga Prasad Poddar, Siddhartha Misra

{"title":"Case study of severe strip breakage in rolling mill of Thin Slab Casting and Rolling (TSCR) shop of TATA Steel, Jamshedpur","authors":"Diptak Bhattacharya, Avinash Mishra, Ganga Prasad Poddar, Siddhartha Misra","doi":"10.1016/j.csefa.2015.11.002","DOIUrl":"10.1016/j.csefa.2015.11.002","url":null,"abstract":"<div><p>In this paper, a case of severe strip breakage in rolling mill of Thin Slab Casting and Rolling (TSCR) shop of TATA Steel, Jamshedpur is presented. Visual observation revealed complete splitting with material missing along the central axis of the strip. Presence of defects in form of white stringers, white patches and holes were observed along the same axis just ahead of split location. Metallurgical analysis revealed association of these defects with slag type foreign materials in the rolled strip. The entrapments of un-deformable materials like slag in slab resulted in the formation of surface discontinuities on the strip on account of differential rolling. The discontinuities manifested in form of holes at lower strip thickness in the later stands of the mill. Inhomogeneous deformation about such holes also resulted in material overlapping. In summary, the breakage of the strip was found to have a strong correlation with the presence of heavy chunk of foreign inclusions from secondary steelmaking sources.</p></div>","PeriodicalId":91224,"journal":{"name":"Case studies in engineering failure analysis","volume":"5 ","pages":"Pages 15-22"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csefa.2015.11.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54177162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Fracture analysis of a low pressure steam turbine blade 某低压汽轮机叶片断裂分析

Case studies in engineering failure analysis Pub Date : 2016-04-01 DOI: 10.1016/j.csefa.2016.02.001

Ernst Plesiutschnig, Patrick Fritzl, Norbert Enzinger, Christof Sommitsch

引用次数: 23

Stress corrosion cracking in Type.316 plates of a heat exchanger 热交换器316型板的应力腐蚀开裂

Case studies in engineering failure analysis Pub Date : 2016-04-01 DOI: 10.1016/j.csefa.2016.03.001

S.H. Khodamorad , N. Alinezhad , D. Haghshenas Fatmehsari , K. Ghahtan

引用次数: 27