Callister - An introduction - 8th edition

Answers to Selected Problems • S1
Chapter 6
6.4 l 0 255 mm (10 in.)
6.7 (a) F 89,375 N (20,000 lb f );
(b) l 115.28 mm (4.511 in.)
6.10 l 0.090 mm (0.0036 in.)
6.13
a dF
dr b r 0
2A
a A nB b 3/11n2
6.15 (a) l 0.50 mm (0.02 in.);
(b) d 1.6 10 2 mm
(6.2 10 4 in.), decrease
6.16 F 16,250 N (3770 lb f )
6.17 0.280
6.19 E 170.5 GPa (24.7 10 6 psi)
6.22 (a) l 0.10 mm (4.0 10 3 in.);
(b) d 3.6 10 3 mm (1.4 10 4 in.)
6.24 Steel
6.27 (a) Both elastic and plastic;
(b) l 3.4 mm (0.135 in.)
6.29 (b) E 62.5 GPa (9.1 10 6 psi);
(c) y 285 MPa (41,000 psi);
(d) TS 370 MPa (53,000 psi);
(e) %EL 16%;
(f) U r 0.65 10 6 J/m 3 (93.8 in. # lb f /in. 3 )
6.36 Figure 6.12: U r 3.32 10 5 J/m 3
(48.2 in. # lb f /in. 3 )
6.38 y 381 MPa (55,500 psi)
6.42 P T 0.237
6.44 T 440 MPa (63,700 psi)
6.46 Toughness 3.65 10 9 J/m 3
(5.29 10 5 in. # lb f /in. 3 )
6.48 n 0.136
6.50 (a) P1elastic2 0.00226,
P1plastic2 0.00774;
(b) l i 463.6 mm (18.14 in.)
6.52 (a) 125 HB (70 HRB)
6.57 Figure 6.12: w 125 MPa (18,000 psi)
6.D2 (a) x 2.5 mm; (b) 10 MPa
Chapter 7
7.9 Al: |b| 0.2862 nm
7.11 cos l cos f 0.408
7.13 (b) crss 0.80 MPa (114 psi)
7.14 crss 0.45 MPa (65.1 psi)
7.15 For (111) 31014: y 4.29 MPa
7.24 d 1.48 10 2 mm
7.25 d 6.9 10 3 mm
7.28 r d 8.25 mm
1n21n 12B
a A 1n22/11n2
nB b
7.30 r 0 10.6 mm (0.424 in.)
7.32 crss 20.2 MPa (2920 psi)
7.37 (b) t 150 min
7.38 (b) d 0.085 mm
7.D1 Is possible
7.D6 Cold work to between 21 and 23%CW [to
d¿ 0 12.8 mm (0.50 in.)], anneal, then cold
work to give a final diameter of 11.3 mm
(0.445 in.).
Chapter 8
8.1 m 2404 MPa (354,000 psi)
8.3 c 16.2 MPa
8.6 Fracture will not occur
8.8 a c 24 mm (0.95 in.)
8.10 Is not subject to detection because
a 4.0 mm
8.12 (b) 105C; (c) 95C
8.14 (a) max 275 MPa (40,000 psi), min
175 MPa (25,500 psi);
(b) R 0.64;
(c) r 450 MPa (65,500 psi)
8.16 N f 1 10 5 cycles
8.18 (b) S 250 MPa; (c) N f 2 10 6 cycles
8.19 (a) 130 MPa; (c) 195 MPa
8.21 (a) t 120 min; (c) t 222 h
8.27 ¢P/¢t 7.0 10 3 min 1
8.28 l 22.1 mm (0.87 in.)
8.30 t r 600 h
8.32 650C: n 11.2
8.33 (a) Q c 480,000 J/mol
8.35 P # s 0.118 s 1
8.D4 T 991 K (718C)
8.D6 For 5 years: 260 MPa (37,500 psi)
Chapter 9
9.1 (a) m s 5022 g;
(b) C L 64 wt% sugar;
(c) m s 2355 g
9.5 (a) The pressure must be raised to approximately
570 atm
9.8 (a) ; C 87 wt% Zn–13 wt% Cu,
C 97 wt% Zn–3 wt% Cu;
(c) Liquid; C L 55 wt% Ag–45 wt% Cu;
(e) , C 49 wt% Zn–51 wt% Cu,
C 58 wt% Zn–42 wt% Cu;
(g) ; C 63.8 wt% Ni–36.2 wt% Cu
9.9 Is not possible
9.12 (a) T 560C (1040F);
(b) C 21 wt% Pb–79 wt% Mg;