Production of Nanostructured Fasteners with High Shear and Fatigue Strength for Using in Aircraft Components
نویسندگان
چکیده
Multi-axis forging (MAF) and cyclic heat treatment are among the most widely used easy to apply grain refinement methods. In this study, micro-alloyed steel samples were first subjected MAF treatments at 880° C. Microstructural analysis showed that average size, which was 13.2 µm initially, decreased 11.2 application of MAF. As a second-grain technique, used. Samples 1, 3, 5, 7, 10 quenching. With method, it observed size 2,3 µm. The mechanical tests second process increased yield tensile strength material by about 16% while decreasing elongation %2. These also presented quenching after application.
منابع مشابه
Fatigue of Threaded Fasteners
ADVANCED MATERIALS & PROCESSES • AUGUST 2014 18 F asteners play a critical role in engineered structures as a method of nonpermanent joining for the aerospace, infrastructure, civil, automotive, energy generation/distribution, and many other industries. Fastener failures can lead to disastrous consequences and substantial financial losses. One of the most common fastener failure modes is fatigu...
متن کاملInspection Policies for Fatigue-sensitive Components in Aircraft Service
As aircraft structures begin to age (that is, as flight hours accumulate), existing subcritical cracks or new cracks can grow in some high-stress points of the structural components. The usual approach is to inspect the structures periodically at certain intervals. Thus, a catastrophic accident during flight can be avoided. The problem then arises of choosing a sequence of inspection times whic...
متن کاملEstimation of Warranty Period for Fatigue-sensitive Aircraft Structure Components
One of the most important problems in the fatigue analysis and design of aircraft structures is the prediction of the fatigue crack growth in service. Available in-service inspection data for various types of aircraft indicate that the fatigue crack damage accumulation in service involves considerable statistical variability. In this paper, we consider the problem of estimating the minimum time...
متن کاملProduction of a novel high strength heavy concrete using tourmaline and galena for neutron and photon radiation shielding
Background: High density concrete is extensively used for efficient radiation attenuation in radiotherapy rooms and nuclear reactors. Over the past eight years, some efficient galena-based concrete samples for shielding X or gamma rays was produced. The goal of this study was to produce a novel high density concrete against neutron and photon radiations using tourmaline and galena. Materials an...
متن کاملthe effects of high non fibrous carbohydrates diet on milk production, inflammation and molecular mechanism of innate immunity in lactating dairy cows
پژوهش حاضر با هدف بررسی اثر جیره حاوی کربوهیدراتهای غیرالیافی زیاد و بروز التهاب در گاوهای شیرده در دو آزمایش جداگانه انجام شد. در آزمایش اول 20 رأس گاو مبتلا به ورم پستان از دو گروه کم تولید و پرتولید (هر کدام 10 رأس) و 20 رأس گاو سالم از دو گروه کم تولید و پرتولید (هر کدام 10 رأس) انتخاب شدند. همه گاوها در دوره دوم و یا سوم شیردهی و در روزهای 80-120 پس از زایش بودند. میانگین تولید شیر در گروه...
ذخیره 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 aviation
سال: 2023
ISSN: ['2587-1676']
DOI: https://doi.org/10.30518/jav.1211562