发布求助
文献互助 智能选刊 最新文献

ASM Failure Analysis Case Histories: Failure Modes and Mechanisms最新文献

筛选
英文 中文
Failure Analysis of Computer Data Storage Disc Drive Systems 计算机数据存储磁盘驱动系统故障分析
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c9001516
K. C. Tripathi
{"title":"Failure Analysis of Computer Data Storage Disc Drive Systems","authors":"K. C. Tripathi","doi":"10.31399/asm.fach.modes.c9001516","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c9001516","url":null,"abstract":"\u0000 This paper deals with disk drive failures that occur in the interface area between the head and disk. The failures often lead to the loss of stored data and are characterized by circumferential microscratches that are usually visible to the unaided eye. The recording media in disk drives consists of a metal, glass, ceramic, or plastic substrate coated with a magnetic material. Data errors are classified as ‘soft’ or ‘hard’ depending on their correctability. Examination has shown that hard errors are the result of an abrasive wear process that begins with contact between head and disk asperities. The contact generates debris that, as it accumulates, increases contact pressure between the read-write head and the surface of the disk. Under sufficient pressure, the magnetic coating material begins wearing away, resulting in data loss.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133727936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intergranular Failure of Austenitic Steel Pump Spindle 奥氏体钢泵主轴的晶间失效
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c9001394
{"title":"Intergranular Failure of Austenitic Steel Pump Spindle","authors":"","doi":"10.31399/asm.fach.modes.c9001394","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c9001394","url":null,"abstract":"\u0000 A 1-in. diam pump spindle fractured within the length covered by the boss of the impeller which was attached to the spindle by means of an axial screw. The pump had been in use in a chemical plant handling mixtures of organic liquids and dilute sulfuric acid having a pH value of 2 to 4 at temperatures of 80 to 90 deg C (176 to 194 deg F). The fracture was unusual in that it was of a fibrous nature, the fibers-which were orientated radially-were readily detachable. The surface of the spindle adjacent to the fracture had an etched appearance and the mode of cracking in this region suggested that failure resulted from an intergranular attack. Subsequent microscope examination confirmed the generally intergranular mode of failure. A macro-etched section near the fracture revealed a radial arrangement of columnar crystals, indicating that the spindle was a cast and not a wrought product as had been presumed. Spectroscope examination showed this particular composition (Fe-23Cr-18Ni-1.8Mo-1.2Si) did not conform to a standard specification and is apparently a proprietary alloy. It was evident that the particular mode of failure was related to the inherent structure of the material.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131974353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dezincification of a Copper Pipe Welded Joint 某铜管焊接接头的脱锌
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c9001411
{"title":"Dezincification of a Copper Pipe Welded Joint","authors":"","doi":"10.31399/asm.fach.modes.c9001411","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c9001411","url":null,"abstract":"\u0000 A welded joint between lengths of 4 in. OD x 13 SWG copper pipe which formed part of a cold-water main failed by cracking over one-third of the circumference. Microscopic examination of the filler metal showed that it had a structure corresponding to a brass of the 60:40 type commonly used for bronze welding. Failure resulted from dezincification of the joint material from the internal side of the tube. Also, a selective attack on the beta phase had occurred. It was evident that the loss in mechanical strength arising from the corrosion had resulted in the development of cracking in service. The filler metal used was not resistant to the conditions to which it was exposed. Copper welding rods as per BS 1077 or a Cu-Ag-P brazing alloy as recommended in BS 699, would have been preferable.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114223776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Failure of Large Screen Spherical Bearing-Crushed Stone 大筛球轴承-碎石破坏
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c9001740
H. Walton
{"title":"Failure of Large Screen Spherical Bearing-Crushed Stone","authors":"H. Walton","doi":"10.31399/asm.fach.modes.c9001740","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c9001740","url":null,"abstract":"\u0000 The contamination of lubrication with powdered stone resulted in progressive wear of the internal surfaces of a bearing. Because of the motion of rollers, the inner race exhibited an unusual cyclic washboard wear pattern. Because of a lack of bearing conformity, wear progressed into severe coarse-grain spalling.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128423000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Compression Fracture of a Graphite-Epoxy Test Structure Due to a Buckling Instability 石墨-环氧测试结构屈曲不稳定性导致的压缩断裂
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c0048498
{"title":"Compression Fracture of a Graphite-Epoxy Test Structure Due to a Buckling Instability","authors":"","doi":"10.31399/asm.fach.modes.c0048498","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c0048498","url":null,"abstract":"\u0000 A graphite-epoxy tapered-box structure, which consisted of two honeycomb skin panels fastened to a spanwise spar with intermediate chordwise ribs, fractured during testing. Hinge-line deflection of the front spar was revealed. Through-thickness cracks in the forward and trailing edges of the compression-loading skin panel were revealed by nondestructive visual examination. A band of de-lamination between the areas of through-thickness skin fracture at the front and rear spar was revealed. A map of the local directions of crack propagation over the fracture surface was generated by the orientation of river patterns and resin microflow during microscopic examination of sectioned samples of the panel. It was discovered that crack initiation occurred at the periphery of a fastener hole located at the front spar. Propagation occurred chordwise across the compression-loaded skin panel. As a corrective measure, the fastener spacing was reduced to prevent the buckling mode that precipitated fracture.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133295244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrosion of a Laser Mirror 激光反射镜的腐蚀
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c0006440
{"title":"Corrosion of a Laser Mirror","authors":"","doi":"10.31399/asm.fach.modes.c0006440","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c0006440","url":null,"abstract":"\u0000 A failed laser mirror and another complete mirror of the same construction were analyzed. The laser mirror consisted of three layers of material brazed together to form channels through which the cooling water flows. Samples were analyzed with light optical and scanning electron microscopy. The corrosion product contained molybdenum and copper with a trace of gold. The base material was analyzed as molybdenum with negligible alloying additions. The primary mode of corrosion attack on the base material appeared to be intergranular, although uniform corrosion was evident also. It was concluded that corrosion attack sufficiently weakened the base material and the brazed joints, allowing catastrophic failure of the mirror due to the pressure of the cooling water. It was recommended that the mirrors be cleaned of all corrosion products present as a result of past service conditions and proof tested. It was recommended that the water system consisting of deionized water and formaldehyde be replaced with water having a low oxygen content and a cathodic inhibitor (oxygen scavenger).","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121685765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cracking of Sheet Metal 金属薄板开裂
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c9001643
D. Aliya
{"title":"Cracking of Sheet Metal","authors":"D. Aliya","doi":"10.31399/asm.fach.modes.c9001643","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c9001643","url":null,"abstract":"\u0000 A crumpled piece of sheet metal had two cracks in a T-junction shape. The relative locations of shear lips in the cracks allowed deduction of which crack happened first, and which direction the cracks propagated.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127769638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rapid Wear of Shell Liner Due to Severe Abrasion 壳体衬套因剧烈磨损而快速磨损
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c0047347
{"title":"Rapid Wear of Shell Liner Due to Severe Abrasion","authors":"","doi":"10.31399/asm.fach.modes.c0047347","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c0047347","url":null,"abstract":"\u0000 A high-chromium white cast iron shell liner installed in an ore crusher sustained impact damage in the course of operation. Visual-optical examination revealed horizontal cracks on the surface of the liner along with particles that had fractured off. Metallographic examination indicated a heavily deformed surface layer with chip formation at the wear surface. The chemical composition of the liner was found to be Fe-2.74C-0.75Mn-0.55Si-0.51Ni-19.4Cr-1.15M. This alloy is highly resistant to abrasive wear, yet at the same time, prone to chipping because little plastic displacement will occur at the surface. The liner failed as a result of severe abrasion caused by the impact of taconite rock. This was a material-selection problem in that the wrong alloy was used for a condition not anticipated in the original choice.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127907872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrosion-Erosion of a Carbon Steel Choke Body 碳钢节流体的腐蚀-侵蚀
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c9001013
P. Ogden
{"title":"Corrosion-Erosion of a Carbon Steel Choke Body","authors":"P. Ogden","doi":"10.31399/asm.fach.modes.c9001013","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c9001013","url":null,"abstract":"\u0000 A wall section of a carbon steel choke body in gas service at 4400 psig blew out three months after the use of a corrosion inhibitor was stopped. Corrosion damage occurred in ripples, leaving both smoothly polished and unattacked areas. The corrodent in condensate wells was principally carbon dioxide dissolved in water condensed from the gas stream, with organic acids possibly an aggravating factor. A gas analysis showed no other corrosive agents. No metallurgical or fabrication defects were found in the carbon steel part. The mode of attack was corrosion-erosion, caused by the corrosive, high velocity gas flow. The corrosion rate of either the inhibited or uninhibited gas stream was too high for equipment in high pressure gas service. Type 410 (12% Cr) stainless steel was recommended for the choke bodies because other equipment such as valves made of type 410 showed no evidence of corrosion damage after three years' exposure. This change was made five years ago and there have been no failures since.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130712576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cracking of Machined End Frame Steel Forgings After Heat Treatment 机加工端架钢锻件热处理后的开裂问题
ASM Failure Analysis Case Histories: Failure Modes and Mechanisms Pub Date : 2019-06-01 DOI: 10.31399/asm.fach.modes.c9001557
A. Das, B. Thippeswamy, J. Prasad
{"title":"Cracking of Machined End Frame Steel Forgings After Heat Treatment","authors":"A. Das, B. Thippeswamy, J. Prasad","doi":"10.31399/asm.fach.modes.c9001557","DOIUrl":"https://doi.org/10.31399/asm.fach.modes.c9001557","url":null,"abstract":"\u0000 A number of machined end frame steel forgings made of Cr-Si-Mn alloy showed tiny cracks during magnetic particle inspection after heat treatment. The cracks were mostly confined to base edges and fillet radius. No significant abnormality was observed in chemical composition and microstructure. SEM, optical microscopy, and gas analysis revealed that the subsurface discontinuous cracks at the bore edges and in the fillet radius of the heat-treated end frame component had occurred due to hydrogen embrittlement, and not because of faulty heat treatment. This conclusion was supported by the presence of cracklike indications in machined bore surface of the annealed part.","PeriodicalId":231268,"journal":{"name":"ASM Failure Analysis Case Histories: Failure Modes and Mechanisms","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130364496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信