نتایج جستجو برای: صفحه 321 aisi
تعداد نتایج: 16402 فیلتر نتایج به سال:
Failure investigation was conducted on a bleed air connector of an aircraft engine that developed opening during service. The fabricated tubular structure wherein the flanges were circumferentially welded to bent pipe both ends. and made austenitic stainless steel AISI 321. Fractography study confirmed had failed by fatigue mechanism. Fatigue crack initiated at one weld joints. exact location i...
In this study, the hardness and wear behaviour of carburized and boronized AISI 8620 steels have been studied. The boronizing treatment increased the hardness of AISI 8620 steels from 395 HV0.1 to a maximal 1610 HV0.1 compared to the carburized steels and also significantly improved its wear behaviour. From obtained results, it can be concluded that boronizing is very effective surface hardenin...
انتخاب مواد مناسب برای واحدهای پتروشیمی و صنایع نفت و گاز از جمله موردهای مهم تلقی میگردد. در انتخاب ماده مناسب، مقاومت به خوردگی، قابلیت نصب و جوشکاری باید مد نظر قرار گیرد. فولادهای زنگ نزن آستنیتی به عنوان مواد مهندسی با مقاومت به خوردگی و اکسیداسیون عالی، کاربرد شایان توجهی در صنایع گوناگون دارند. در این پژوهش، مقاومت به اکسیداسیون خط جوش فولاد زنگ نزن آستنیتی 321 aisi با فلز پرکننده 347 a...
Low-temperature radiation hardening and embrittlement is a major life-limiting effect in austenitic stainless steels (AuSS). A strain-induced phase transformation to martensite observed during plastic deformation of low-Ni AuSS, often increasing strain reducing ductility. However, this paper we show an unexpectedly high ductility 18–37% room-temperature mechanical testing 0.12C–18Cr–10Ni–0.8Ti ...
The Attachment Insecurity Screening Inventory (AISI) 2-5 years is a parent-report questionnaire for assessing attachment insecurity in preschoolers. Validity and reliability of the AISI 2-5 years were examined in a general sample (n = 429) and in a clinical sample (n = 71). Confirmatory factor analysis (CFA) confirmed a three-factor model of avoidant, ambivalent/resistant and disorganized attac...
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