Fundamentals of Materials Science and Engineering: An Integrated Approach, 3e

GTBL042-14 GTBL042-Callister-v2 August 29, 2007 8:59

588 • Chapter 14 / Synthesis, Fabrication, and Processing of Materials

Tensile strength (MPa) Tensile strength (ksi)

Yield strength (MPa)

Ductility (%EL)

Tempering temperature (C)

Yield strength (ksi)

700

500

600

700

800

900

1000

1100

1200

800

900

1000

1100

25 mm

12.5 mm

12.5 mm

25 mm

25 mm

50 mm

50 mm

100 mm

100 mm

12.5 mm

50 mm

100 mm

1200

180

160

140

120

1300

500 550

160

140

120

100

80

600 650

500 550 600 650

14

16

18

20

22

24

(a)

(b)

(c)

Figure 14.14 For

cylindrical specimens

of an oil-quenched

4140 steel, (a) tensile

strength, (b) yield

strength, and (c)

ductility (percent

elongation) versus

tempering

temperature for

diameters of 12.5 mm

(0.5 in.), 25 mm

(1 in.), 50 mm (2 in.),

and 100 mm (4 in.).