Q1: Which of the following metals is the most prone to work hardening?

ANS:A - Brass

Brass is an alloy composed primarily of copper and zinc, with the zinc content typically ranging from 5% to 45% by weight. The exact composition of brass can vary depending on the desired properties for a particular application. Here are some key characteristics and properties of brass:

1. Corrosion Resistance: Brass exhibits excellent corrosion resistance, particularly in atmospheric and marine environments. This makes it suitable for applications where resistance to rust and corrosion is important, such as plumbing fittings, valves, and marine hardware.
2. Malleability and Ductility: Brass is highly malleable and ductile, meaning it can be easily shaped, formed, and fabricated into various shapes and products. It can be rolled into sheets, drawn into wires, or machined into intricate parts without significant risk of fracturing or breaking.
3. Good Electrical and Thermal Conductivity: Brass has good electrical and thermal conductivity, making it useful for electrical connectors, terminals, and heat exchangers.
4. Attractive Appearance: Brass has a warm, golden color that is aesthetically pleasing, making it popular for decorative applications such as hardware, musical instruments, and architectural elements.
5. Work Hardening: Brass can undergo work hardening, which occurs when the material is deformed through processes such as bending, hammering, or rolling. Work hardening increases the strength and hardness of brass but can also reduce its ductility over time if excessive deformation occurs.
6. Variety of Alloys: Brass alloys can be tailored to meet specific requirements by adjusting the proportions of copper and zinc, as well as adding other alloying elements such as lead, tin, or aluminum. These variations can alter properties such as hardness, machinability, and corrosion resistance to suit different applications.