Assignment Mr Materials Report: The Purpose Of This Educatio ✓ Solved

Assignment Mr Materials Reportgoldthe Purpose Of This Education Is

Assignment # MR – Materials Report Gold The purpose of this education is to prepare for a professional career. Therefore, ALL assignments are expected to have a professional presentation. This assignment provides one opportunity for students to explore the materials commonly found in industrial manufacturing processes – you will be assigned a material to investigate.

This assignment is particularly prescriptive, and the specific requirements are listed below.

Assignment Requirements: Your report will consist of EXACTLY three (3) pages appropriately formatted:

• All pages: Margins (all pages): Left 1.00", Right 1.00", Top 1.00", and Bottom 1.00".
• A page header in 10 pt Arial typeface with the following information: Last name, First Name, Material name, Spr17.
• A table of the material's properties to include, but not limited to, the following:
  • Physical: Specific gravity and volume, density, etc.
  • Mechanical: Tensile (yield, ultimate, & fracture) and compressive strengths, tensile modulus, hardness, Izod impact strength, elongation, wear resistance, etc.
  • Metallurgical: Alloy(s), heat treatments (tempers), forms, malleability, machinability, etc.
  • Thermal: Thermal conductivity, coefficient of thermal expansion, deflection temperature, transition temp., flammability class (UL), etc.
  • Chemical: Resistance to sunlight, acids, alkalis, salt water, petroleum products, etc.
  • Electrical: Volume resistivity, arc resistance, dielectric strength, etc.
• A material overview in paragraph format to include, but not limited to:
  • A brief history of the material (discovery & early usage).
  • Advantages of the material.
  • Disadvantages of the material.
  • End user fabrication methods and characteristics, including special handling.
  • A list or table of typical/recommended applications.
• A bibliography with a minimum of 3 citations in APA format (see CBAT Language Skills Handbook).

NOTE: Wikipedia is NOT a legitimate source.

Grading: Organization/Presentation (30%), Content and Sources (35%), and Grammar & Layout (35%).

Sample Paper For Above instruction

Introduction to Gold as a Material in Industrial Manufacturing

Gold has been valued by civilizations for thousands of years, originally discovered in prehistoric times and used historically for jewelry, currency, and decorative arts. Its unique properties and aesthetic appeal have sustained its significance through history, making it one of the most precious metals. Its discovery dates back to ancient Egypt and Mesopotamian civilizations, where it was initially mined and utilized for ornamental purposes (Hocker & Meyer, 2014).

Physical and Mechanical Properties

Gold is characterized by its high specific gravity of approximately 19.3 g/cm³, making it one of the densest metals used in industry. It exhibits excellent malleability and ductility, allowing it to be hammered into thin sheets or drawn into fine wires. Mechanically, gold demonstrates relatively low tensile strength but offers superior elongation and ductility, which facilitates shaping and forming processes (Lide, 2004). The metal possesses a remarkable corrosion resistance, including resistance to oxidation and many acids, which enhances its durability in various applications.

Metallurgical Characteristics

Pure gold is often alloyed with metals such as copper or silver to improve its strength and machinability, forming alloys like 18-karat or 14-karat gold. These alloys affect properties such as malleability and color, which are important for jewelry and industrial uses. Gold’s heat treatment processes are minimal, but alloying and cold working are common methods to enhance specific characteristics.

Thermal and Chemical Properties

Gold has high thermal conductivity (~319 W/m·K), making it suitable for electronic applications requiring efficient heat dissipation. Its coefficient of thermal expansion is moderate, facilitating stability in temperature-sensitive devices. Chemically, gold is highly resistant to sunlight, acids (excluding aqua regia), alkalis, salt water, and petroleum products, making it ideal for corrosion-resistant coatings and electronic contacts (Weast, 1984). It is also considered inert in biological environments, which is advantageous in medical applications.

Electrical Properties

Gold exhibits excellent electrical conductivity with a volume resistivity of approximately 2.44 × 10^-8 Ω·m. Its high arc resistance and dielectric strength make it a preferred material for high-reliability electrical connectors and circuit boards (Carter & Williams, 2013).

Historical Overview and Usage

Historically, gold was discovered around 2600 BC and quickly became a symbol of wealth and status. Its early use was primarily in coinage and adornment, with its malleability allowing artisans to craft intricate designs. During the 20th century, advances in extraction and alloying techniques expanded its industrial applications, including electronics and dentistry (Jones, 1998).

Advantages and Disadvantages

Gold's advantages include its outstanding corrosion resistance, excellent electrical and thermal conductivity, malleability, and biocompatibility. Its disadvantages involve its high cost, softness relative to other metals, and relative scarcity, which limit its use in large-scale structural applications (Schwartz, 2004).

Fabrication Methods and Applications

Gold is fabricated through processes such as electroplating, rolling, forging, and casting. Special handling is often necessary to prevent contamination, tarnishing, or deformation during manufacturing. Common applications include electronics (contacts, connectors), jewelry, dental restorations, and decorative coatings (Rosenblum & Pearl, 2017). Gold's unique properties enable it to function effectively in environments requiring high reliability and corrosion resistance.

Conclusion

Gold remains an invaluable material in modern industry owing to its exceptional electrical and chemical properties, historical significance, and aesthetic qualities. While cost and softness pose limitations, ongoing advancements in alloying and fabrication continue to extend its application scope, sustaining its relevance across diverse fields.

References

• Carter, C., & Williams, J. (2013). Electrical conduction in metals. Journal of Physical Chemistry, 117(20), 10589–10602.
• Hocker, S., & Meyer, A. (2014). The history of gold and its cultural significance. Historical Metallurgy, 48(2), 86–98.
• Jones, A. (1998). Gold: History and global significance. Mining Journal, 339(7858), 123–125.
• Lide, D. R. (2004). CRC handbook of chemistry and physics (85th ed.). CRC Press.
• Rosenblum, M., & Pearl, R. (2017). Jewelry manufacturing processes: From design to finished product. Jewelry Quarterly, 68(4), 34–39.
• Schwartz, M. (2004). Precious metals and their applications. Metals & Alloys Review, 21(3), 44–49.
• Weast, R. C. (1984). CRC handbook of chemistry and physics (65th ed.). CRC Press.