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Article
Production of Al-Mg alloy Ribbons by Using Single Roller Wheel Melt Spinning as a Non-Conventional Forming Technology.

Authors: Ahmad. K. Jassim --- Ali S. Hammood
Journal: Basrah Journal for Engineering Science مجلة البصرة للعلوم الهندسية ISSN: Print: 18146120; Online: 23118385 Year: 2014 Volume: 14 Issue: 2 Pages: 155-161
Publisher: Basrah University جامعة البصرة

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Abstract

Single roll melt spinning is a non-conventional forming process used to produce rapidly solidified thin ribbons as a near net shaper by direct casting from liquid state. In this paper, single roll made from brass with a diameter of 150 mm was used to produce rapidly solidified Al-Mg alloys ribbons. The ribbons are produced with thickness in the range of 20 to 330 μm. The results exhibited unique advantages in refining the microstructure, and modifying the mechanical properties of these ribbons. The hardness was improved to about twice the original hardness of alloy. Moreover, corrosion resistance of alloy was improved and their rate was redcued from 10.02 to 1.643 mpy for alloy type 5052 and from 6.91 to 1.943 mpy for 5083.


Article
EFFECT OF FIBER ORIENTATION ON FATIGUE OF GLASS-FIBER REINFORCEMENT EPOXY COMPOSITE MATERIAL
دراسة تاثير اتجاه الالياف على الكلال للمادة المتراكبة ذات اساس الايبوكسي المدعم بالياف الزجاج

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Abstract

ABSTRACTIn this research, the main objectives of this investigation as, first, study the effect of fibers orientation on fatigue strength for composite materials, second, study the effect of fiber orientation on shape and direction of fracture surface for composite materials. The experimental work using to study fatigue limit for composite material with different fiber orientation as (00, 30o, 450, 60o, 90o) and study of the fatigue surface (shape and direction of fatigue surface of composite material) for each fiber orientation fiber.The material using for composite material in this research are epoxy resin matrix and glass reinforcement fiber with volume fracture of fiber in composite material about (0.21). The results are endurance fatigue strength with number of cycle for fiber orientation (00, 30o, 450, 60o, 90o) and the shape and direction of surface fatigue of composite material.

الخلاصةفي هذا البحث تمت دراسة تأثير، أولا: زاوية الألياف على مقاومة الكلل للمادة المركبة، ثانيا:دراسة تأثير زاوية الألياف على شكل الكسر الناتج وعلى اتجاه مساحة الكسر للمادة المركبة. تضمنت الدراسةعلى إجهاد الكلل وشكل واتجاه مساحة (o90 ،o60 ،o45 ،o30 ،o العملية دراسة تأثير زاوية الألياف ( 0الكسر.المادة المركبة التي تمت دراستها مكونة من مزيج مادة الايبوكسي (كمادة رابطة) والياف الزجاج(كمادة تقوية). النتائج التي تم الحصول عليها هي مقاومة الكلل للمادة المركبة وعدد الدورات التي تسبب.(o90 ،o60 ،o45 ،o30 ،o الكسر وشكل الكسر وزاوية الكسر للمادة المركبة لعدة زوايا لالياف التقوية ( 0

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