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Course: E 344, Fall 2009School: Stevens
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low At temperature (< 1394 oC), pure iron has the body-centered-cubic crystal structure with atoms at each corner of the unit cell and one in the center of the cell. Its lattice parameter 0.2866 is nm. Sketch a BCC unit cell and then DERIVE the relation between atomic radius and lattice parameter. Use this relation to show that the atomic radius of an iron atom is 0.124 nm.
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low At temperature (< 1394 oC), pure iron has the body-centered-cubic crystal structure with atoms at each corner of the unit cell and one in the center of the cell. Its lattice parameter 0.2866 is nm. Sketch a BCC unit cell and then DERIVE the relation between atomic radius and lattice parameter. Us...
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Stevens - E - 344
Stevens - E - 344
Section S2: The Development of Microstructure # S2.1 S2.2 S2.3 S2.4 S2.4 S2.5 S2.6 S2.7 S2.8 S2.9 S2.10 S2.11 S2.12 Section heading Microscopies to image microstructure Diffusion Surface energy Nucleation and growth Phases and the P-T Phase diagram B
Stevens - E - 344
Chapter 4. Electrical Properties4.1. Ohms law.When an electrical potential difference (a voltage) V is applied to a solid, an electric current I flows through it. The applied voltage V required for a given current I is determined by the electric r
Stevens - E - 344
Fabrication of integrated circuits.The microprocessor chip of a modern computer contains about 500 million transistors on an area approximately 11 x 11 mm (about inch square). Moore's law is often cited in the development of computers. In 1965, Gor
Stevens - E - 344
Problems Magnetic Materials1. Suppose a design is needed for a solenoid that will develop a magnetic field of 10 kA/m when powered with 1A in vacuum. The solenoid dimensions are 0.3m in length and 2 cm in diameter. a. How many turns of wire are req
Stevens - E - 344
Chapter 6. Fracture, Fatigue and Creep.After studying this chapter you will be able to: Distinguish between ductile and brittle fracture. Describe a stress concentrator (also called stress raiser) and the danger it represents. Distinguish bet
Stevens - E - 344
Chapter M.Magnetic Materials. (Traugott Fischer, Stevens Tech.)APCs Magetism. After studying this chapter, the student will be able to: 1. For important classes of applications such as transformers, door catches and magnetic data storage, define
Stevens - E - 344
Problems Magnetic Materials1. Suppose a design is needed for a solenoid that will develop a magnetic field of 10 kA/m when powered with 1A in vacuum. The solenoid dimensions are 0.3m in length and 2 cm in diameter. a. How many turns of wire are req
Stevens - E - 344
Section 3. Structural Materials.Structural materials are the ones we use in the construction of buildings and machines where we rely on their response to applied forces. In buildings and machines, we rely on the ability of the material to resist def
Stevens - E - 344
Chapter 6. Fracture, Fatigue and Creep.After studying this chapter you will be able to: Distinguish between ductile and brittle fracture. Describe a stress concentrator (also called stress raiser) and the danger it represents. Distinguish bet
Stevens - E - 344
Chapter P. Phase diagrams.After studying this chapter, you will be able to P1. P2. P3. P4. Sketch the phase diagram of a solid solution and analyze this diagram: determine the composition and amount of each phase for a given overall composition and
Stevens - E - 344
Section S2: The Development of Microstructure # S2.1 S2.2 S2.3 S2.4 S2.4 S2.5 S2.6 S2.7 S2.8 S2.9 S2.10 S2.11 S2.12 Section heading Microscopies to image microstructure Diffusion Surface energy Nucleation and growth Phases and the P-T Phase diagram B
Stevens - E - 344
This test consists of 8 pages. There are 5 problems. Questions 6-14 are multiple choice questions. Some constants are given on page 7, and a periodic table is given on page 8.E-344 Fall 2008 Test 2 6 November, 2008 Honor Pledge:Name: __ ID#: __
Stevens - E - 344
Suppose a thin film (50 nm thick) of nickel is deposited on the end of a very long copper bar. If this bar is heated to 0.8 of the melting temperature of Cu, draw schematic plots of the Ni concentration as a function of distance from the end of the b
Stevens - E - 344
Consider the diffusion of aluminum into an initially pure wafer of silicon 1 mm thick. An Alcontaining gaseous atmosphere in a furnace fixes the surface concentration of Al on the wafer at 1018 atoms/cm3. The furnace is held at 1100oC where the Al di
Stevens - E - 344
The diffusivity of Boron in Silicon at 1200oC is 7x10-13 cm2/sec. At 1000oC it is 2x10-15 cm2/sec. (a) Determine the diffusivity of B in Si at T=1150oC. (b) Is B a p-type dopant or an n-type dopant in Si? () What is the majority carrier in pure Si be
Stevens - E - 344
The diffusivity of Arsenic (As) in Silicon (Si) at T=1200oC is 5x10-13 cm2/sec. At T=1000oC it is 3x10-15 cm2/sec. (a) Determine the diffusivity of As in Si at T=1100oC. (b) Is As a p-type dopant or an n-type dopant in Si? () What is the majority car
Stevens - E - 344
The diffusivity of C in BCC Fe is 2.45x10-12 m2/sec at 500 oC and 3.16x10-11m2/sec at 700 oC. Using these data, develop an Arrhenius-type expression ( D(T) = Doexp[-Q/kBT] ) describing the temperature dependence of this diffusivity. Using the express
Stevens - E - 344
This test consists of 8 pages. There are 5 problems. Questions 6-14 are multiple choice questions. Some constants are given on page 7, and a periodic table is given on page 8.E-344 Fall 2008 Test 2 6 November, 2008 Honor Pledge:Name: __ ID#: __
Stevens - E - 344
A plain-carbon steel has a yield strength of 35 ksi, a tensile strength of 52 ksi and a modulus of 29,000 ksi. Suppose a 3 inch diameter rod of this steel with a length of 10 feet is loaded in tension with 10,000 pounds of force. a. Determine the str
Stevens - E - 344
Would you expect the indentation due to a 10 mm diameter ball under a 3000 g load to be larger for SAE 1340 steel or for 18-8 stainless steel? Briefly justify your answer. No calculations are needed.
Stevens - E - 344
The yield strengths and fracture toughness values characteristic of several engineering alloys are given in the table below. Consider a structural application where a material must support a tensile stress of 730 MPa. If non-destructive testing equip
Stevens - E - 344
Core 6.8 Using the diagram below, identify which material has: a. b. c. d. e. the highest yield stress the highest tensile stress the lowest ductility the highest ductility the highest modulusa) b) c) d) e)3 3 3 1 2 and 3
Stevens - E - 344
A) R = 0 exp ER k bT E ln R = ln 0 + R k T b E 1 1 ln 100 ln 10 = R k b 529 556 4.605 2.303 = E R = 2.16eVB) 5 1 9.18 10. eV K 8.63 10 5 K ER2.16eV = ln 0 5 eV 529 K 8.63 10 K 0 = 2.83 10 19 hr ln 100 chec
Stevens - E - 344
This is an example of low-cycle fatigue. The plaintiff did, in fact, plastically deform the bar. It bent occasionally when he used it. Then he plastically deformed it more each time he bent it back. During each cycle of bending back and forth, the ba
Stevens - E - 344
This test consists of 8 pages. There are 5 problems. Questions 6-14 are multiple choice questions. Some constants are given on page 7, and a periodic table is given on page 8.E-344 Fall 2008 Test 1 30 September, 2008 Honor Pledge:Name: __ ID#: _
Stevens - E - 344
Fabrication of integrated circuits.The microprocessor chip of a modern computer contains about 500 million transistors on an area approximately 11 x 11 mm (about inch square). Moore's law is often cited in the development of computers. In 1965, Gor
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Chapter 4. Electrical Properties4.1. Ohms law.When an electrical potential difference (a voltage) V is applied to a solid, an electric current I flows through it. The applied voltage V required for a given current I is determined by the electric r
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