GTBL042-answers GTBL042-Callister-v3 October 11, 2007 13:37
Revised Pages856 • Answers to Selected Problems7.15 (b)E=200 GPa (29× 106 psi);
(c)σy=750 MPa (112,000 psi);
(d)TS=1250 MPa (180,000 psi);
(e)%EL= 11 .2%;
(f)Ur= 1. 40 × 106 J/m^3 (210 in.-lbf/in.^3 )
7.17 Figure 7.12:
Ur= 3. 32 × 105 J/m^3 (48.2in.-lbf/in.^3 )
7.20 T= 0. 311
7.22 Toughness
= 7. 33 × 108 J/m^3 (1. 07 × 105 in.-lbf/in.^3 )
7.24 (a)(elastic)∼= 0. 0087 ,(plastic)∼= 0 .0113;
(b)li= 616 .7mm(24.26 in.)
7.26 Ff=17,200 N (3870 lbf)
7.27 (a)E 0 =265 GPa (38. 6 × 106 psi)
7.28 (b)P= 0. 144
7.30 (a)σy=19 MPa
(b)TS= 12 .2 MPa
(c)%EL=634%
7.35 Brass:TS(MPa)= 80 + 2. 9 ×HB
[TS(psi)=13,000+ 410 ×HB]
7.37 Figure 7.12:σw=125 MPa (18,000 psi)
7.D1 (a)x= 3 .66 mm; (b)σ= 5 .50 MPaChapter 8
8.5 Cu:|b|= 0 .2556 nm
8.8 (a)τR(110)−[111]=τR(101)−[111]= 1 .63 MPa;
τR(011)−[111]=0 MPa
8.12 (b)σy=305 MPa (44,200 psi)
8.15 r 0 = 7 .2mm(0.280 in.)
8.16 τcrss= 6 .28 MPa (910 psi)
8.18 (b)d= 0 .109 mm
8.23 TS= 112 .5 MPa
8.27 Fraction sites crosslinked=0.174
8.D1PossibleChapter 9
9.1 σm=2800 MPa (400,000 psi)
9.4 Fracture will occur
9.6 Is subject to detection sincea≥ 3 .0mm
9.8 ρt= 4 .1nm
9.9 (b)− 100 ◦C; (c)− 110 ◦C
9.11 Nf∼= 1 × 107 cycles
9.13 (a)t=30 min; (c)t= 27 .8h
9.17 /t= 3. 2 × 10 −^2 min−^1
9.20 (a)Qc=186,200 J/mol
9.21 ̇s= 4. 31 × 10 −^2 (h)−^1
9.D2T=1197 K (924◦C)Chapter 10
10.1 (a)ms=2846 g;
(b)CL=64 wt% sugar;
(c)ms=1068 g
10.3 (b)The pressure must be lowered to
approximately 0.003 atm.
10.5 (a)α;Cα=25 wt% Pb-75 wt% Mg
(d)α+L;Cα=8 wt% Ag-92 wt% Cu,
CL=45 wt% Ag-55 wt% Cu
10.7 (a)T= 1320 ◦C (2410◦F);
(b)Cα=62 wt% Ni-38 wt% Cu;
(c)T= 1270 ◦C (2320◦F);
(d)CL=37 wt% Ni-63 wt% Cu
10.8 (a)Wα= 1. 0
(d)Wα= 0. 38 ,WL= 0. 62
10.10 (a)T∼= 540 ◦C (1000◦F);
(b)Cα=26 wt% Pb;CL=54 wt% Pb
10.11Cα= 88 .3 wt% A-11.7 wt% B;
Cβ= 5 .0 wt% A-95.0 wt% B
10.12Possible atT∼= 800 ◦C
10.14 (b)Vβ= 0 .43;Vγ= 0. 57
10.17Not possible because differentC 0 required
for each situation
10.20Schematic sketches of the microstructures
called for are shown below.900 °C
L
(~68 wt% Zn)
L
(64 wt% Zn)
(~63 wt% Zn)
(64 wt% Zn)
(64 wt% Zn)820 °C750 °C 600 °C10.24Eutectics: (1) 10 wt% Au, 217 ◦C,
L→α+β; (2) 80 wt% Au, 280 ◦C,
L→δ+ζ; Congruent melting point:
62 .5 wt% Au, 418 ◦C,L→δ
Peritectics: (1) 30 wt% Au, 252 ◦C,
L+γ→β; (2) 45 wt% Au, 309 ◦C,
L+δ→γ; (3) 92 wt% Au, 490 ◦C,
L+η→ζ.
No eutectoids are present.
10.26 (a)8.1% of Mg^2 +vacancies