Fatigue failure is almost considered as the predominant problem affecting automotive parts under dynamic loading condition. Thus, more understanding of crack behavior during fatigue can strongly help in finding the proper mechanism to avoid the final fracture and extent the service life of components. The main goal of this paper is to study the fracture behavior of low carbon steel which is used mostly in automotive industry. For this purpose, the fractography of samples subjected to high and low stress levels in fatigue test then was evaluated and analyzed. Hardness and tensile tests were carried out to determine the properties of used steel. Also, the samples were characterized by microstructure test and XRD analysis to examine the constitute phases. The fatigue test (S-N curve) was done at stress ratio (R= -1), and the fracture examination was perform using Scanning Electron Microscope (SEM). The results of microstructure and XRD analysis were indicating that the Ferrite and a little amount of pearlite are the dominant phases of this steel. Whereas, the fractography observations reveal that the void coalescence ductile fracture is the main failure mode in samples with high stress level, while the ductile fracture (void coalescence) with Transgranular Cleavage fracture was noticed in low stress fatigue mode for this alloy.
الديمقراطية في الفكر الاسلامي المعاصر وعلاقتها بنظرية الشورى
The intellectual and revolutionary movements that have emerged since the beginning of the second half of the first century of the Islamic era did not appear suddenly, but must have preceded by a social consciousness, multi-forms, in the forefront of class awareness and religious awareness, and awareness was more painful, Of the society of the Arabian Peninsula - before Islam - feel it and suffer from it, a sense of injustice and tyranny, oppression and humiliation, and the destruction of dignity as well as poverty and hunger, and the injustice of tribal laws, and tyranny of each other and the tyranny of their heads on the tribes members and families belonging to this tribe or hill
Receipt date:9/1/2020 accepted date:11/24/2020 Publication date:12/31/2021
This work is licensed under a Creative Commons Attribution 4.0 International License.
the Nile River and the Renaissance Dam is one of the most prominent factors that had an important role in the nature of relations between Egypt - Ethiopia, as they contributed to building a relationship that has common characteristics through the nature of the i
... Show Moreالامن الجماعي في اسيا .. بقلم : لونيك فرو وار
The followers of philosophical lesson in Iraq discover steps and important stages through which the country had passed in , since the control of this thought in Arab Islamic civilization until recent time as well as touch the important changes that had happened on it
Islam has paid great deal of attention to land issue where has been
considered most resources for providing Muslims with water and food and
building on that we notice that the Islamic government worked hardly to give
attention ton the land especially newly included under control of Muslims
especially that they had got with out fighting or bloodshed but had been
included via reconciliation with the landlords so the Muslims had share in that
would be taken either in cash or in materials in a value would be differentiated
following several issues like type of harvest and method of watering the land
and religion of the landlords.
So Muslims had listed laws and rules that enable them typical investment
for that l
Much has been written about Baghdad in the history books and documents ,about the Origin of its call , Reality ,history ,peoples ,Rulers and all that have passed since the beginning of creation and so far...
همجوارى جغ ا رفياى ميان عربها واي ا رنيان نقش بز رگ در بروز آشكار برخى از روابط وعلاقه
هااى مياان دو زباان عرباى وفار اى وهمچناين مياان دو ادبيااا عرباى وفار اى وگويناد كاه ادبيااا
فار ى قديم اولين ادبياا خارجى كاه باه ادبيااا عرباى مبوا، باود وهماين باعا انبشاار زباان عرباى
در اي ا رن شد. وبعد از فبح ا لامى زبان فار ى بيشبر وا ه ژ هاى خود از زبان عربى گرفاا همچناين
به زبان عربى ب يارى از وا ه ژ هاى وادر كرد
يناقش هذه البحث فكرة الهوية الوطنية العراقية عند الإمام محمد تقي الشيرازي، والوقوف على دراسة سيرته الذاتية والعلمية، وتحديد مواقفه السياسية، ورؤيته لفكرة الهوية الوطنية العراقية، من خلال البحث والتحليل لأبرز مواقفه ورسائله وافكاره السياسية.
مكانية استخدام السوق المالية في التنبؤ بالدورات الاقتصادية