Materials and processes in engineering: chapter activity, Assignments of Materials Processing

Download Materials and processes in engineering: chapter activity and more Assignments Materials Processing in PDF only on Docsity!

Eastern Samar State University Salcedo Campus College of Engineering Material and Processes for ABE (Chapter Activity) Submitted by: John Benedict Padit BSABE II – I Submitted to: Engr. Rodrigo Quiza

1. What are metals? - Metals are good conductors of heat and electricity and are malleable (they can be hammered into sheets) and ductile (they can be drawn into wire). Most of the metals are solids at room temperature, with a characteristic silvery shine (except for mercury, which is a liquid) (angeloSU).

• a metal (Greek: Metallon) is an element that readily forms positive ions (cations) and has metallic bonds. Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons. The metals are one of the three groups of elements as distinguished by their ionisation and bonding properties, along with the metalloids and nonmetals. https://www.cs.mcgill.ca/ 2. Discuss the advantages of metals that makes it as a good engineering material.
• According to engineerfix.com, these are the common advantages of metals that makes it a good engineering material:  Heat resistant (higher melting points)  Strong material  Good conductor both electrically and thermal  Long lifespan  Metals can be bent and shaped  Some metals are relatively low cost to buy  Easily joined together 3. Give 2 metal products and discuss each uses in building construction.
• REBAR Different uses of rebar include:  Primary reinforcement: Used to provide resistance to support design loads.  Secondary reinforcement: Used for durability and aesthetic purposes by providing localised resistance to limit cracking and temperature-induced stresses.  Provide resistance to concentrated loads, spreading it through a wider area.  Assist other steel bars in accommodating their loads by holding them in the correct position.  External steel tie bars to constrain and reinforce masonry structures, sometimes as a means of building conservation.  Reinforced masonry: Some masonry blocks and bricks include voids to accommodate rebar to carry tensile loads. The rebar is secured in place using grout.

5. Discuss 1 metal manufacturing process. Roll Forging Roll forging, also known as roll forming, is a forging method that uses opposing rolls to form a metal part. Even though roll forging uses rolls to produce parts and components, it is still considered a metal forging process and not a rolling process. The process involves two cylindrical or semi-cylindrical horizontal rolls that are used to deform a round or flat bar stock. Through this action, the thickness is reduced, and the length is increased. Parts produced through roll forging have superior mechanical properties than those produced from many other processes. After being inserted, a heated bar is passed between the two rolls. It’s progressively shaped while rolling through the machine’s shaped grooves. The precisely shaped geometry of these grooves are what forge the part to the specified dimensions. A product example of this manufacturing process is the rebar making, such as in the video on our report.