Page 339 - Mechanical Behavior of Materials

340 Chapter 8 Fracture of Cracked Members

Table 8.1 Fracture Toughness and Corresponding Tensile
Properties for Representative Metals at Room Temperature
Toughness Yield Ultimate Elong. Red. Area
Material K Ic σ o σ u 100ε f %RA
√
MPa m MPa MPa % %
√
(ksi in) (ksi) (ksi)
(a) Steels
AISI 1144 66 540 840 5 7
(60) (78) (122)
ASTM A470-8 60 620 780 17 45
(Cr-Mo-V) (55) (90) (113)
ASTM A517-F 187 760 830 20 66
(170) (110) (121)
AISI 4130 110 1090 1150 14 49
(100) (158) (167)
18-Ni maraging 123 1310 1350 12 54
air melted (112) (190) (196)
18-Ni maraging 176 1290 1345 15 66
vacuum melted (160) (187) (195)
300-M 152 1070 1190 18 56
650 C temper (138) (156) (172)
◦
300-M 65 1740 2010 12 48
◦
300 C temper (59) (252) (291)
(b) Aluminum and Titanium Alloys (L-T Orientation)
2014-T651 24 415 485 13 —
(22) (60) (70)
2024-T351 34 325 470 20 —
(31) (47) (68)
2219-T851 36 350 455 10 —
(33) (51) (66)
7075-T651 29 505 570 11 —
(26) (73) (83)
7475-T7351 52 435 505 14 —
(47) (63) (73)
Ti-6Al-4V 66 925 1000 16 34
annealed (60) (134) (145)
Sources: Data in [Barsom 87] p. 172, [Boyer 85] pp. 6.34, 6.35, and 9.8,
[MILHDBK 94] pp. 3.10–3.12 and 5.3, and [Ritchie 77].