Define the Word ( not asking dictionary definitions) Assignment - 1

Define the Word ( not asking dictionary definitions) - Assignment Example Hence, sublime is like a documentary, which has a collection of the art, music, technology, nature, lifestyle and culture of the America. Such include the technological and natural changes as represented by the artists in different forms. As used in the readings, representation means a depiction of ideas in visual arts and literature. Such include the depiction of ethical concerns of the Americans in literature. Thus, representation provides a unique form of non-verbal communication where pictures, images and literature act as the key substitutes of imagined or remembered things in America (David, 1986). Representation gives meaning and a sense of appreciation of the things, which individuals in their current state are not able to perceive or see. It is vital for representation to occur throughout in artwork to ensure that people can have an actual depiction of the things, which they cannot see in their current physical

Magnesium alloys - AK80 and ZK60 Essay Example | Topics and Well Written Essays - 2750 words

Magnesium alloys - AK80 and ZK60 - Essay Example Magnesium alloys like Mg ZK60 and Mg AK80 have occupied the essential demands for automotive Mg parts. Car structural parts are essentially produced from energy absorption materials with reasonable elongation, high yield strength and most importantly high impact energy. A type of alloys called Wrought Mg alloys have the potential to serve these needs better then the die cast Mg alloys. 1 more benefit of using alloys is â€Å"The use of Wrought Mg parts in vehicles will cause weight saving up to an average of 30% compared to Aluminum and 70% compared to steel. Magnesium alloys are in demand now days for the properties like low density, high melting and boiling point, high specific strength, good electromagnetic shielding characteristics, excellent castability and machinability. Magnesium AZ80 Structure Magnesium ZK60 Structure Types of Alloys Magnesium alloys are divided mainly in 2 types. First type is Cast Alloys. Magnesium casting  proof stress  is mainly 75-200  MPa,  ten sile strength is between  135-285  MPa and elongation 2-10%. Common  density  is 1800  kg/m3  and  Young's modulus  is 42 GPa. Some of the most popular and common alloys are AZ63, AZ81, AZ91, ZK51, ZK61, Elektron 21. Second is Wrought Alloys. Magnesium wrought alloy proof stress mainly coincides between 160 and 240  MPa, tensile strength is 180-440  MPa and elongation remains 7-40%. ... Like (A= aluminum, Z= Zinc, M= Manganese, S= Silicon) and remaining the two digits after the letters indicates towards the percent composition respectively. For an example – If the given alloy is AZ63, we can predict that the two elements, Aluminum and Zink are present in the alloy and the percent composition of both the metals is 6% and 3% respectively. Specification Physical properties of Alloys Magnesium and its alloys mainly have silvery and white shades. As discussed above, Magnesium is the lightest structural metal present. So the alloys of magnesium are used to build structures like automobiles and massive buildings. As magnesium being reactive in nature, the alloy of magnesium is used for the building purposes. Magnesium and its alloys can be fabricated very easily. Pieces of Magnesium’s alloys can be welded, molded, cut and shaped according to requirement. Magnesium is the 6th most found element in nature, consisting of 2.1% of the earth’s crust. Common density of Magnesium alloys is 1800 Kg/m3. Relative Intensity of Magnesium Chemical properties of Alloys: - Magnesium is present in 2nd group and 3rd period of the periodic table, having atomic no as 12. Its average atomic mass is 24.035 gm. The boiling point of magnesium in standard conditions is 1090 degree Celsius or 1994 degree Fahrenheit. Magnesium is one of the most reactive metals present in the periodic table that is why; generally magnesium is not present in Free State on the earth. This is 1 of the need to form the alloys. The alloys of Magnesium like AZ80 and ZK60 have high melting and boiling points as compared to Magnesium. Alloys have higher stable condition and can be kept freely in the atmosphere. Uses of the given alloys Variety of the stock for subsequent working