Which of the following are desirable properties of the work material in metal forming? Properties such as
high compressive strength, surface hardness, ductility, wear resistance, and reliability
are desired in materials used for forming and have to be altered to meet specialized applications.
Which of the following mechanical properties is desirable for metal forming processes?
However, some forming processes- Stretch the metal (tensile stresses). Others bend the metal (tensile and compressive). Still others apply shear stresses. Desirable material properties:
Low yield strength
.
Which of the following are desirable properties of the work material in metal forming?
Which of the following are desirable properties of the work material in metal forming? Properties such as
high compressive strength, surface hardness, ductility, wear resistance, and reliability
are desired in materials used for forming and have to be altered to meet specialized applications.
Which three of the following are basic bulk deformation processes in metal forming?
Answer. The four basic bulk deformation processes are
(a) rolling, (2) forging, (3) extrusion, and (4) wire and bar drawing
.
Which of the following are bulk metal forming operations?
Bulk forming processes include
forging, swaging, extruding, rolling and drawing
. These actions produce “wrought” metal alloys, which have high density, homogeneity and integrity. Forging, rolling and extruding machines apply compressive stress to deform metals.
How does increasing temperature affect the parameters in the flow curve equation in forming operations )?
How does increasing temperature affect the parameters in the flow curve equation?
Increasing temperature decreases both K and n in the flow curve equation
. Indicate some of the advantages of cold working relative to warm and hot working. What is isothermal forming?
Which two of the following are alternative names for indirect extrusion?
Casting, Semi-Solid Forming and Hot Metal Forming
Indirect extrusion, also called
backward/reverse extrusion
, as shown in Figure 2(b), is characterized by no friction between the billet and container wall. Thus, the indirect extrusion has many technical advantages as follows: 1.
What is warm working process?
Hot working process metals are
plastically deformed above their recrystallization temperature
. Being above the recrystallization temperature allows the material to recrystallize during deformation. … Many kinds of working, including rolling, forging, extrusion, and drawing, can be done with hot metal.
Which of the following are desirable properties of aluminum?
- Light Weight. Aluminum is a very light metal with a specific weight of 2.7 g/cm
3
, about a third of that of steel. … - Corrosion Resistance. …
- Electrical and Thermal Conductivity. …
- Reflectivity. …
- Ductility. …
- Strength at Low Temperatures. …
- Impermeable and Odorless. …
- Non-magnetic.
What is sticking friction in metalworking?
Sticking friction is
when the work surface adheres to the surface of the tool rather than slides against it
; it occurs when the friction stress is greater than the shear flow stress of the metal. It is generally associated with hotworking.
What are the three basic types of sheet metalworking operations?
The three basic types are
(1) cutting, (2) bending, and (3) drawing
. In conventional sheet metalworking operations, (a) what is the name of the tooling and (b) what is the name of the machine tool used in the operations?
What are the four bulk deformation processes?
For a concise overview of the basic deformation processes, it is pertinent to focus on the four main bulk deformation processes, namely,
rolling, forging, extrusion, and bulk drawing
and on the four main sheet deformation processes, namely, bending, drawing, stretching, and shearing.
What is deformation process?
Deformation processes
transform solid materials from one shape into another
. The initial shape is usually simple (e.g., a billet or sheet blank) and is plastically deformed between tools, or dies, to obtain the desired final geometry and tolerances with required properties (Altan, 1983).
Which is an example of bulk metal forming?
Bulk forming is accomplished in forming presses with the help of a set of tool and die. Examples for products produced by bulk forming are:
gears, bushed, valves
, engine parts such as valves, connecting rods, hydraulic valves, etc. Sheet metal forming involves application of tensile or shear forces predominantly.
What are bulk metals?
Bulk metals are
electrically conducting and good optical reflectors
, as caused by the sea of freely moving delocalized electrons in the conduction band.
Which of the following are forming operations?
Drawing Welding Continuous casting Extrusion Die casting Rolling Forging Powder metallurgy
.
