Aluminium alloy

CHAPTER 3 LITERATURE REVIEW 3.1 Introduction The Al-Zn-Mg series aluminium alloys (7xxx) are the heat treatable alloys and widely applied as large structural components in navigation and transportation facilities, due to good combination of hardness, high strength and fracture toughness [1-6]. The use of Sc (scandium) to achieve grain refinement has recently received great attention. The microstructures and properties of aluminium alloys are strongly affected by adding small quantities of scandium.

There are various materials which can be used on aircrafts. Composite and alloy materials are the primary component used due to the ability to combine certain materials with different strengths together to create a composite or alloy. These have ultimate properties that are needed to create an aircraft to be used safely in application. Composites are used due to the extreme high strength to weight ratio, although using large amounts of metals can be strong, unlike composites this would be too heavy

JOINING OF DISSIMILAR ALUMINIUM ALLOYS BY FRICTION STIR WELDING FOR VARIOUS WELDING PARAMETERS Muhilarasu.S1a, SanthoshKumar. A1b, Karthik Kumar.E1c,Raveen.R2 1-UG Students, 2-Assistant professor Department of Mechanical Engineering, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, India. Abstract: Friction stir welding (FSW) process is a new solid-state joining technique that is widely adopted in manufacturing and many fields for joining different metallic alloys which are difficult

Esther.T.Akinlabi et al. [12] conducted FSW and the influence of friction stir welding processing parameters on dissimilar joints conducted between aluminium alloy (AA5754) and commercially pure copper (C11000) was studied. It was found that the joint interfacial regions of the welds were characterized by interlayers of aluminium and copper. The

1 INTRODUCTION 1.1 Aluminium: Aluminium is a chemical element in the boron group with symbol Al and atomic number 13. It is available in large quantity. It is combined with 270 different materials. Aluminium is good for corrosion resistance. Aluminium is soft, light weight and ductile material. It can be easily machined and extruded. 1.2 Alloy: An alloy is a material formed by two or more chemical elements that has metallic properties, in which at least one is a metal. Alloys are designed and produced

Aluminium is a very reactive metal with high affinity for oxygen but the metal is highly resistant to most environments and to a great variety of chemical agents. This resistance is due to the inert and protective character of the aluminium oxide film which forms on the metal surface. Welding of aluminium still represents a critical operation due to its complexity and the high level of defect that can be produced in the joint. The main problems are related to the properties of aluminium. They are:

have resulted in the Al-Sc primary alloy. The development of Al-Sc alloys first prospered in the Soviet Union, where military request was the main dynamic

When most people hear an airplane in the air they may look up and see just another airplane. They don’t think about how the airplane evolved. They also don’t consider any of the material it requires to achieve this most amazing feat. It’s just another aircraft carrying people or items to their destination. The journey began, as most of us have been taught, in 1903 by the Wright brothers when they flew their airplane for the first time. The aircraft was crudely constructed, using modern materials

Maraging steels of different compositions have been prepared by means of induction furnace electro slag remelting technique using titanium and chromium instead of cobalt which is a high expensive strategic element, also nickel content was reduced to 10-13%. Mass attenuation coefficients, half value layers and effective atomic numbers have been determined for the prepared samples at photon energies 238, 583, 661, 911, 1173, 1332 and 2614keV. The results are compared with the corresponding theoretical

addition on grain refinement in cast magnesium alloys. 1. Introduction: Magnesium is 30% lighter than aluminum and possesses excellent mechanical properties. It has higher weight to strength ratio, damping capacity, dimensional stability, impact and dent resistance when compared to aluminum alloys or steel alloys. These properties have increased the usage of magnesium alloys in the automotive and aerospace industry for weight reduction. But magnesium alloys are often associated with some limitations