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| 1 | ELIMIMATION OF RANDOM DEFACTS IN AEROSPACE MATERIALS显示文摘In the pastfew years,severalnew melting processeshavebeenindustrialised forthe produc tion ofsuperalloys,titanium alloysand high qualitysteelsfor useintheaero engineindustry.Theseincludeelectron beam , plasma,inductionskull,andthe”triple melt”process( VIM + ESR+ VAR) . These developments have allbeen instituted in responsetothe major per ceived problem oftheindustry ;that oftheincidence of random defectsin the alloys whichcause problemsinregardto predictablelifing ofthefinished partinservice. Thedirectconse quenceofthe uncertaintyislossof revenue due to premature retirement of parts which mayhavecompleted on a fraction oftheir actualservicelife; a conservatism on the partof design parameters whichleadsto uneccesary weightin thepart;and ariskofeitherservicefailuresor partrecalls whichinterruptengine performance. Thebenefitsoftheprocesschangesinrespectoftheproducts’absolute propertiesand alsoonthereproducibility and inspectability ofthose properties have been substantial. Itisclearthattheprocesses offer the industry a solution to the present dilem ma of how to treatthe ”rare”defectsfrom the pointof view of fracture mechanicslifing methodology. The use ofprocesscontrols which guarantee”zero defect”productisdevelopingintoacriticaltoolfortheextension oftherangeof a given alloy’s use. Itislikelyto permit very substantial gainsinboth componentlife and intheallowablestressin rotating parts withoutthe needtointroduce new materials carrying new problems of user confidence, production reliability and data base. Weconcludethatthenew processesareatastageof development wherethey arereadyforwideindustry usein production. They will not add significantly tothecomponentcost andthey willgive a renwed lifespan to the more familiar materials and methodsof aero engineconstruction. | A. Mitchell Advanced Materials Research Laboratory, University of British Columbia, Vancouver BC,Canada | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，4： | 2 |
| 2 | Why people stay: using jobembeddedness to predict voluntary turnover 显示文摘 | Mitchell TR Holtom BC Lee TW etal | 2001 | The Academy ofManagement Journal2001，，6： | 1 |
| 3 | Why people stay: using job embeddedness to predict voluntary turnover显示文摘 | Mitchell TR Holtom BC Lee TW | 2001 | AMJ2001，44，6： | 1 |
| 4 | Laparoscopically assisted colectomy and wound recurrence显示文摘 | Alexander RJ Jaques BC Mitchell KG | 1993 | Lancet1993，341，： | 1 |
| 5 | A multicenter, randomized, controlled study to investigate EXtending the time for Thrombolysis in Emergency Neurological Deficits with Intra-Arterial therapy (EXTEND-I)显示文摘 | Campbell BC Mitchell PJ Yan B | 2014 | In J Stroke2014，9，： | 1 |
| 6 | Endovascular therapy for ischemic stroke with perfasion-imaging selection 显示文摘 | Campbell BC Mitchell PJ Kleinig TJ ct al | 2015 | Engl J Med2015，372，11： | 1 |
| 7 | Why people stay: Using job embeddedness to predict voluntary turnover 显示文摘 | Mitchell TR Hohom BC Lee TW | 2001 | Academy of Management Journal2001，44，6： | 1 |
| 8 | Review Doxycyeline sclerotherapy of an in- traosseous femoral lymphatic malformation: case report and literature review 显示文摘 | Wiblc BC Mitchell SJ | 2009 | Vase Interv Radiol2009，20，5： | 1 |
| 9 | Endovascular therapy for ischemic stroke with perfusion-imaging selection显示文摘 | Campbell BC Mitchell PJ Kleinig T J eta | 2015 | N Engl J Med2015，372，： | 1 |
| 10 | A multicenter, random- ized, controlled study to investigate Extending the time for Throm- bolysis in Emergency Neurological Deficits with Intra-Arterial ther- apy (EXTEND-IA) 显示文摘 | Campbell BC Mitchell PJ Yah B | 2014 | Int J Stroke2014，9，1： | 1 |
| 11 | Administration of a substituted adamantyl urea inhibitor of soluble epoxide hydrolase protects the kidney from damage in hypertensive Goto-Kakizaki rats显示文摘 | Olearczyk JJ Quigley JE Mitchell BC | 2009 | Clin Sci2009，116，1： | 1 |
| 12 | Laparoscopically assisted colectomy and wound recurrence显示文摘 | Alexander RJ Jaques BC Mitchell KG | 1993 | Lancet1993，341，8839： | 1 |
| 13 | Why people stay:Using job embeddedness to predict voluntary turnover 显示文摘 | Mitchell TR Holtom BC Lee TW | 2001 | Acad Manage J2001，44，6： | 1 |
| 14 | Endovaseular therapy for ischemie stroke with perfusion-imaging selection显示文摘 | Campbell BC Mitchell PJ Kleinig TJ | 2015 | N Engl J Med2015，372，： | 1 |
| 15 | Endovascular therapy for ischemic stroke with perfusion-imaging selection显示文摘 | Campbell BC Mitchell PJ Kleinig TJ | 2015 | N Engl J Med2015，372，： | 1 |
| 16 | A multicenter, randomized, controlled study to investigate EXtending the time for Thrombolysis in Emergency Neurological Deficits with Intra-Arterial therapy (EXTEND-IA)显示文摘 | Campbell BC Mitchell P J Yan B | 2014 | Int J Stroke2014，9，1： | 1 |
| 17 | Endovascular therapy for ischemic stroke with perfusion-imaging selection显示文摘 | Campbell BC Mitchell PJ Kleinig TJ | 2015 | N Engl J Med2015，372，： | 1 |
| 18 | A multicenter, randomized, controlled study to investigate EXtending the time for Thrombolysis in Emergency Neurological Neurological Deficits with Intra-Arterial therapy (EXTEND-IA)显示文摘 | Campbell BC Mitchell PJ Van B | 2014 | Int J Stroke2014，9，： | 1 |
| 19 | Endovascular therapy for ischemic stroke with perfusion-imaging selection显示文摘 | Campbell BC Mitchell PJ Kleinig TJ | 2015 | N Engl J Med2015，372，： | 1 |
| 20 | Endovascular therapy for isehemic stroke with perfusion-imaging selection 显示文摘 | Campbell BC Mitchell PJ Kleinig TJ | 2015 | N Engl J Med2015，372，11： | 1 |
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