Engineering Materials vol 2 Part 4 doc

... is r* 910 = 2 9 14 27 3 9 14 910 γ αβ ∆H ( ) ( ) + − = 2 γ αβ ∆H × 29 7. (8 .4) But at 900°C the critical radius is r* 900 = 2 9 14 27 3 9 14 900 γ αβ ∆H ( ) ( ) + − = 2 γ αβ ∆H × ... the vol- ume of the nucleus. For 0 ഛ θ ഛ 90° these are: solid–liquid area = 2 π r 2 (1 − cos θ ); (7 .4) catalyst–solid area = π r 2 (1 − cos 2 θ ); (7.5) nucleu...

Ngày tải lên: 11/08/2014, 02:22

... 1190 121 20 0.5 30–100 1 120 85 19 0 .4 >100 1 728 45 0 89 13 0.5 >100 1600 42 0 22 14 0 .2 >100 1550 45 0 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 ... 180 24 0.1–0.35 30 40 890 130 22 0.1–0.17 20 –70 890 150 24 0.01–0.15 5–30 860 140 20 0 .25 1 940 530 22 9 0.1–0 .2 50–80 1 920 610 6 8 0 .4 693 390 120 31...

Ngày tải lên: 11/08/2014, 02:22

... to grain Balsa 0.1–0.3 4 0 .2 23 12 0.05 1 .2 Mahogany 0.53 13.5 0.8 90 46 0 .25 6.3 Douglas fir 0.55 16 .4 1.1 70 42 0. 34 6 .2 Scots pine 0.55 16.3 0.8 89 47 0.35 6.1 Birch 0. 62 16.3 0.9 – – 0.56 – Ash ... cheaper. Table 26 .4 Specific strength of structural materials Material E r s r y K IC r Woods 20 –30 120 –170 1– 12 Al-alloy 25 179 8–16 Mild steel 26 30 18 Con...

Ngày tải lên: 11/08/2014, 02:22

... m −3 . Equations (28 .22 ) and (28 .23 ) then give us the following data. f || (s −1 ) ≈ 59 23 6 531 944 147 5 21 24 28 91 etc. ! 21 7 868 1953 34 72 etc. f ⊥ (s −1 ) ≈ @ 1 24 49 6 1116 19 84 3100 etc. For ... n l Ebd bd n l Ebd bd ww ww cc cc 2 2 3 12 2 2 3 12 2 122 12 π ρ π ρ || || || || || || || ||             =             // (28 .28 ) whi...

Ngày tải lên: 11/08/2014, 02:22

... eutectic 42 Ag + 19 Cu 610– 620 High-strength; high-temperature. (free-flowing) + 16 Zn + 25 Cd Silver; general-purpose 38 Ag + 20 Cu 605–650 High-strength; high-temperature. (pasty) + 22 Zn + 20 Cd Case ... alloys at 20 0°C. We can use exactly the same method, as Fig. 3.3 shows. A typical constitution at 20 0°C would be: (a) 50 wt% lead + 50 wt% tin, (b) two phases, 24 Engineering...

Ngày tải lên: 11/08/2014, 02:22

... SharePoint® 20 10 Infrastructure Lesson 2 Planning Tasks for Content Management There are several sets of tasks for each part of the planning process for content management in SharePoint Server 20 10. ... records. For document and records management in SharePoint Server 20 10, you can create custom workflows to move documents to a records archive. You can also use either ShareP...

Ngày tải lên: 04/07/2014, 13:20

... shown in Figure 7 .20 [7]. 100 20 0 500 1000 20 00 5000 10 4 2 × 10 4 5 × 10 4 10 5 2 × 10 5 5 × 10 5 10 6 2 × 10 6 5 × 10 6 10 7 20 0 500 1000 20 00 5000 10 4 2 × 10 4 5 × 10 4 10 5 2 × 10 5 5 × 10 5 10 6 100 50 20 10 Piezoviscous-elastic Piezoviscous-rigid Lubrication ... p max = 3W 2 ab = 3 × 50 2 (2. 32 × 10 4 ) × (1.75 × 10 4 ) = 588.0 [MPa] p...

Ngày tải lên: 05/08/2014, 09:19

... Miescher (1 844 –1895). Miescher isolated a cellular substance containing nitrogen and phosphorus. womi_R 5/7/03 8:17 AM Page 48 8 Quorum sensing WORLD OF MICROBIOLOGY AND IMMUNOLOGY 47 4 • • Bacterial ... called CD4 receptors. CD4 stands for cluster of differentiation, and CD type 4 is found on specific T cells called helper cells. The human retroviruses discovered so far bind only to CD...

Ngày tải lên: 10/08/2014, 03:20

... 1 04 22 00-3300 25 00- 540 0 27 50- 320 0 1800 -25 00 5000-1 5000 8000-1 20 00 120 0 -20 00 1300-3000 1800 -23 00 120 0-1 25 0 1150- 120 0 910- 120 0 91 0-930 120 0-1 A00 1100- 140 0 25 00- 320 0 120 0-1 ... 100-1 40 50-60 50-58 6-9 x lo8 7.5-8 .4 X lo6 1.8 -2. 25 x lo7 4. 5-6.75 x lo5 5 .25 - 12 x lo4 1.95 -2. 25 x lo4 2. 4- 3.6 x lo4 4....

Ngày tải lên: 11/08/2014, 02:22

... 2. 5-3 .2 3 .2 3 .2 3.0 2. 7 2. 7 2. 6 2. 5 2. 2-3.0 2. 6 -2. 9 2. 4 -2. 5 1 .4 -2. 2 2. 2 2. 3 2. 0 1.85-1.9 1. 74- 1.88 1.55-1.95 1.8 1.3-1.6 1.5-1.6 1 .l-1.5 1 .4 1 .l-1 .4 1 .l-1.3 1 .2- 1.3 ... A 120 3 Alkali halides Magnesia, MgO 22 .7 21 .4 13 .4- 1 9.6 19.3 18.9 14. 0-1 7.0 16.6-1 6.9 10.0-1 3.7 1 1 .O- 12. 5 10.7-1 1.3 10.5 7.9-1...

Ngày tải lên: 11/08/2014, 02:22