0

official ielts practice materials vol 2 free download

Engineering Materials vol 2 Part 1 doc

Engineering Materials vol 2 Part 1 doc

Kĩ thuật Viễn thông

... 100 (140) 7.9 21 1 50 20 0Mild steel 20 0 23 0 (26 0–300) 7.9 21 0 22 0 430High-carbon steel 150 (20 0) 7.8 21 0 350–1600 650 20 00Low-alloy steels 180 25 0 (23 0–330) 7.8 20 3 29 0–1600 420 20 00High-alloy ... 30–100 1 120 85 190.4 >100 1 728 450 89 130.5 >100 1600 420 22 140 .2 >100 1550 450 11 12 0.1–0.5 45 933 917 24 0 24 0.1–0.45 45 915 24 0.1–0 .25 10–50 860 180 24 0.1–0.35 30–40 890 130 22 0.1–0.17 ... 12 0 .21 140 1765 4 82 60 12 0.1–0 .2 20–50 1570 460 40 12 0.1–0 .2 50–170 1750 460 40 12 0.1–0.5 50–170 1680 500 12 30 10–180–0.18 6 20 14030.5–0.9 >100 1356 385 397 170.5 30–100 1190 121 20 0.5...
  • 21
  • 305
  • 0
Engineering Materials vol 2 Part 2 doc

Engineering Materials vol 2 Part 2 doc

Kĩ thuật Viễn thông

... High-strength; high-temperature. (free- flowing) + 16 Zn + 25 CdSilver; general-purpose 38 Ag + 20 Cu 605–650 High-strength; high-temperature.(pasty) + 22 Zn + 20 Cd Case studies in phase diagrams ... hot-water layout, you will already have had some direct experience ofthis system. 22 Engineering Materials 2 Fig. 2. 7. Many metals are made up of two phases. This figure shows some of the shapes ... (Fig. 2. 2c). But if A atoms prefer to have A neigh-bours, or B atoms prefer B neighbours, the solution can cluster (Fig. 2. 2d); and when Aatoms prefer B neighbours the solution can order (Fig. 2. 2e).Many...
  • 25
  • 212
  • 0
Engineering Materials vol 2 Part 3 pot

Engineering Materials vol 2 Part 3 pot

Kĩ thuật Viễn thông

... ∆H = −334 kJ kg−1. For water at 27 2 K, with Tm − T = 1 K, we find that Wf =1 .22 kJ kg−1 (or 22 J mol−1). 1 kg of water at 27 2 K thus has 1 .22 kJ of free work avail-able to make it turn ... Conservation of volume gives 4343433313 2 3πππrrr =+. (5.30)Combining eqns (5 .29 ) and (5.30) gives∆A = 413 2 323 1 2 2 2 πγ[( ) ( )]./rr rr+−+(5.31)For r1/r 2 in the range ... coarsening process? If we put r1 = r 2 /2 in eqn. (5.31) we get ∆A = −4πγ(−0.17 r 2 2). If γ = 0.5 J m 2 and r 2 = 10−7 m our twoprecipitates give us a free work of 10−14 J, or about...
  • 25
  • 302
  • 0
Engineering Materials vol 2 Part 4 doc

Engineering Materials vol 2 Part 4 doc

Kĩ thuật Viễn thông

... the vol- ume of the nucleus. For 0 ഛ θ ഛ 90° these are:solid–liquid area = 2 πr 2 (1 − cos θ); (7.4)catalyst–solid area = πr 2 (1 − cos 2 θ); (7.5)nucleus volume = 2 313 2 1 2 33πr ... (7.1) we can writeWf = 2 πr 2 (1 − cos θ)γSL + πr 2 (1 − cos 2 θ)γCS − πr 2 (1 − cos 2 θ)γCL −−+− cos cos ( ). 2 313 2 1 2 33πrHTTTmmθθ∆(7.7)Note ... the interfacial energy terms to reduceto 2 πr 2 (1 − cos θ)γSL + πr 2 (1 − cos 2 θ)(–γSL cos θ),or 2 πr 2 {1 − 3 2 cos θ + 1 2 cos3 θ}γSL. (7.9)The complete result...
  • 25
  • 356
  • 0
Engineering Materials vol 2 Part 5 pps

Engineering Materials vol 2 Part 5 pps

Kĩ thuật Viễn thông

... 2. 1 41–160 150 25 0Ti alloys 4.5 120 170– 128 0 27 2. 4 1.1 38 28 0 400–600(Steels) (7.9) (21 0) (22 0–1600) 27 1.8 0.75 28 20 0 (400–600)* See Chapter 25 and Fig. 25 .7 for more information about these ... strengthE/r*E1 /2 /r*E1/3/r* sy/r*Creepr(Mg m−3) modulussy(MPa) temperatureE(GPa) (°C)Al alloys 2. 7 71 25 –600 26 3.1 1.5 9 22 0 150 25 0Mg alloys 1.7 45 70 27 0 25 4.0 2. 1 41–160 150 25 0Ti ... readingM. F. Ashby and D. R. H. Jones, Engineering Materials I, 2nd edition, Butterworth-Heinemann,1996, Chapters 7 (Case study 2) , 10, 12 (Case study 2) , 27 .Further readingI. J. Polmear, Light Alloys,...
  • 25
  • 302
  • 0
Engineering Materials vol 2 Part 6 pot

Engineering Materials vol 2 Part 6 pot

Kĩ thuật Viễn thông

... 0 .20 0.55B 0.40 0.60 1 .20 0.30 1.50C 0.36 0.70 1.50 0 .25 1.50D 0.40 0.60 1 .20 0.15 1.50E 0.41 0.85 0.50 0 .25 0.55F 0.40 0.65 0.75 0 .25 0.85G 0.40 0.60 0.65 0.55 2. 55 116 Engineering Materials ... Jones, Engineering Materials I, 2nd edition, Butterworth-Heinemann,1996, Chapters 21 , 22 , 23 and 24 .Further readingK. J. Pascoe, An Introduction to the Properties of Engineering Materials, Van ... started the crack which led to the Alexander Keillandfailure.)Example 2: Pressure vessel steel to A 387 grade 22 class 2 A 387 22 (2) is a creep-resistant steel which can be used at about 450°C. It...
  • 25
  • 327
  • 0
Engineering Materials vol 2 Part 7 pps

Engineering Materials vol 2 Part 7 pps

Kĩ thuật Viễn thông

... 100010 3–5 23 23 (1470) 795 25 .6 8.5 15040 – 3110 – 1 422 84 4.3 30040 4 21 73 – 627 17 3 .2 50010 4– 12 2843 – 670 1.5 8 50010 5 –– 710 20 25 3 .2 51040 0 .2 ––1.8 10–14 #<5040 0 .2 – 21 0–14$– ... 20 0 20 00 20 0–500 10 21 Sialons (490–1400) 3 .2 300 20 00 500–830 15Cement, etc.Cement 52 (73) 2. 4 2. 5 20 –30 50 7 12 Concrete 26 (36) 2. 4 30–50 50 7 12 Rocks and iceLimestone Cost of mining 2. 7 ... − b) 2 + w 2 = r 2 . (14.11)Provided b Ӷ 2r this can be expanded to give wrb .= 2 (14. 12) Thus wdrbdrdbd //== 22 12 12 . (14.13) 148 Engineering Materials...
  • 25
  • 333
  • 0
Engineering Materials vol 2 Part 9 pps

Engineering Materials vol 2 Part 9 pps

Kĩ thuật Viễn thông

... concretes 20 9Fig. 20 .2. (a) The hardening of Portland cement. The setting reaction (eqn. 20 .5) is followed by thehardening reactions (eqns 20 .6 and 20 .7). Each is associated with the evolution ... 20 .7). Each is associated with the evolution of heat (b).2C 2 S + 4H → C3S 2 H3+ CH + heat (20 .6)2C3S + 6H → C3S 2 H3+ 3CH + heat. (20 .7)dTobomorite gel.Portland cement is stronger than ... anycement are, in this nomenclatureLime CaO = CAlumina Al 2 O3 = ASilica SiO 2 = SWater H 2 O = H. 20 0 Engineering Materials 2 Fig. 19.9. Forming methods for glass: pressing, rolling, float-moulding...
  • 25
  • 338
  • 0
Engineering Materials vol 2 Part 10 pot

Engineering Materials vol 2 Part 10 pot

Kĩ thuật Viễn thông

... 1500–1700 0. 12 0 .24 26 –60– 22 0 ≈350 25 00 ≈0.15 ≈600– 171 ≈350 25 00 ≈0.15 ≈600– 20 0 ≈350 25 00 ≈0.15 ≈600–– – – – ––– – – – ––– – – – – 22 8 Engineering Materials 2 Chapter 22 The structure ... 0.1–0.15 70–100 2. 4 350 370 – 0.15 50–701.6 378 400 1500 0 .2 54– 72 3–5 340 350– 420 1900 0 .2 0 .25 80–950.6–1.0 380 400– 440 1700 20 00 0 .2 0.5 55–900.5 340 420 – 440 120 0 24 00 0 .2 0 .24 50–100–– ... coefficient (20 °C)Tg (K) temperature (W m−1 K−1)(MK−1)(MPa m1 /2 )Ts (K)1 2 270 355 22 50 0.35 160–190 2 5 300 390 21 00 0. 52 150–3003.5 25 3 310 1900 0 .2 100–300–– 395 1050 0 .25 70–1002...
  • 25
  • 320
  • 0

Xem thêm