The absorbed energy in Charpy impact test for specimens with mechanical heterogeneity.
نویسندگان
چکیده
منابع مشابه
Impact Toughness Modification of NIST Low-Energy Charpy Verification Specimens for Testing at Room Temperature
The possibility for the National Institute for Standards and Technology (NIST) to certify Charpy reference specimens for testing at room temperature (21 °C ± 1 °C) instead of −40 °C was investigated in a previous study, in which a slightly increased likelihood of specimen jamming was observed at the low-energy level (13 J to 20 J). Moreover, there is a concern that the higher impact toughness o...
متن کاملA NOVEL PROCEDURE FOR MEASURING THE IMPACT FRACTURE TOUGHNESS KId WITH PRECRACKED CHARPY SPECIMENS
A procedure i s presented f o r determining the impact f r a c t u r e toughness K w i t h precracked Charpy specimens wi thout performing any load measurements.'?he Kid-val ue i s obtained from preestabl ished impact response curves and a measurement o f t h e t ime-to-fracture. The measuring technique i s f u l l y dynamic and does not impose any r e s t r i c t i o n s on t h e t e s t condi...
متن کاملthe test for adverse selection in life insurance market: the case of mellat insurance company
انتخاب نامساعد یکی از مشکلات اساسی در صنعت بیمه است. که ابتدا در سال 1960، توسط روتشیلد واستیگلیتز مورد بحث ومطالعه قرار گرفت ازآن موقع تاکنون بسیاری از پژوهشگران مدل های مختلفی را برای تجزیه و تحلیل تقاضا برای صنعت بیمه عمر که تماما ناشی از عدم قطعیت در این صنعت میباشد انجام داده اند .وهدف از آن پیدا کردن شرایطی است که تحت آن شرایط انتخاب یا کنار گذاشتن یک بیمه گزار به نفع و یا زیان شرکت بیمه ...
15 صفحه اولCertification of NIST Room Temperature Low-Energy and High-Energy Charpy Verification Specimens.
The possibility for NIST to certify Charpy reference specimens for testing at room temperature (21 °C ± 1 °C) instead of -40 °C was investigated by performing 130 room-temperature tests from five low-energy and four high-energy lots of steel on the three master Charpy machines located in Boulder, CO. The statistical analyses performed show that in most cases the variability of results (i.e., th...
متن کاملThe Effect of Microstructure on Estimation of the Fracture Toughness (KIC) Rotor Steel Using Charpy Absorbed Energy (CVN)
The proportional relationships between the Charpy absorbed energy (CVN) and the KIC values have been established for a wide variety of steels. Several formulae have been proposed that predict KIC from CVN. The purpose of this study is to investigate, by means of compact testing fracture toughness specimens, the effective role of microstructure for estimation of the fractur...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Society of Materials Science, Japan
سال: 1986
ISSN: 1880-7488,0514-5163
DOI: 10.2472/jsms.35.1405