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fracture toughness
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Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540169
EISBN: 978-1-62708-309-6
... Abstract This chapter discusses various types of material fracture toughness and the methods by which they are determined. It begins with a review of the basic principles of linear elastic fracture mechanics, covering the Griffith-Irwin theory of fracture, the concept of strain energy release...
Abstract
This chapter discusses various types of material fracture toughness and the methods by which they are determined. It begins with a review of the basic principles of linear elastic fracture mechanics, covering the Griffith-Irwin theory of fracture, the concept of strain energy release rate, the use of fracture indices and failure criteria, and the ramifications of crack-tip plasticity in ductile and brittle fractures. It goes on to describe the different types of plain-strain and plane-stress fracture toughness, explaining how they are measured and how they are influenced by metallurgical and environmental variables and loading conditions. It also examines the crack growth resistance curves of several aluminum alloys and describes the characteristics of fracture when all or some of the applied load is in the plane of the crack.
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Published: 01 December 2001
Fig. 1 Plane-strain fracture toughness of maraging steels compared with fracture toughness of several ultrahigh strength steels as a function of tensile strength.
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Published: 01 June 1983
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Published: 01 June 1983
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Published: 01 June 1983
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Published: 01 June 1983
Figure 8.8 Temperature dependence of fracture toughness for alloys, illustrating characteristic behavior for three different crystal structures.
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Published: 01 June 1983
Figure 8.10 Fracture toughness vs. strength level for a wide variety of commercial alloys tested at 295 and 4 K.
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Published: 01 June 1983
Figure 8.11 Temperature dependence of fracture toughness for various nonaustenitic steels, showing the beneficial effects of increased nickel content on transition temperature and subtransition range toughness.
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Published: 01 June 1983
Figure 8.12 The grain-size effect on fracture toughness of a ferritic steel at various temperatures in the brittle, subtransition temperature range.
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Published: 01 June 1983
Figure 11.7 Fracture toughness of two austenitic stainless steels —AISI types 310 and 316 — at temperatures between 4 and 300 K ( LNG Materials and Fluids , 1978 ).
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Published: 01 June 1983
Figure 11.13 Fracture toughness of five nitrogen-strengthened austenitic stainless steels at temperatures between 4 and 300 K ( Read and Reed, 1979 ).
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Published: 01 June 1983
Figure 11.14 Trend line for fracture toughness vs. yield strength at 4 K for austenitic stainless steels ( Read and Reed, 1981 ). ○ — 304 (N); △ — 316 (N); □ — other austenitic stainless steels.
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Published: 01 June 1983
Figure 11.22 Fracture toughness of AWS 316 and 316L weld metals at 76 and 4 K as a function of ferrite content ( Read et al., 1980 ).
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Published: 01 June 1983
Figure 11.23 Fracture toughness of fully austenitic weld metals at 4 K as a function of grain width. ● — Read et al., 1980 ; △ — LCP; ○ — MFTF. LCP and MFTF refer to weld procedure qualification welds prepared for the Large Coil Project, Oak Ridge National Laboratory and the Magnetic Fusion
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Published: 01 June 1983
Figure 11.26 The effect of δ -ferrite on the fracture toughness at 4 K of CF8M austenitic stainless steel castings containing 0.05% N ( Whipple and McHenry, 1982 ).
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Published: 01 June 1983
Figure 11.27 Fracture toughness of 3.5, 5, and 9% N steels at temperatures between 4 and 300 K ( Tobler et al., 1976 ).
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Published: 01 June 1983
Figure 11.32 Static and dynamic fracture toughness of 5, 5.5, and 9% Ni steels at 77 and 103 K ( Murayama, 1976 ).
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Published: 01 June 1983
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Published: 01 June 1983
Figure 11.45 Temperature dependence of fracture toughness for Ti–6Ai–4V alloys ( Fowlkes and Tobler, 1976 ). ● — K Ic ; ○— K Q .
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Published: 01 September 2005
Fig. 30 Fracture toughness in carburized steels as a function of distance below the surface. The SAE PS55, 9310, and 8620 steels were commercial heats; the SAE PS32 and 4820 steels were laboratory heats. The PS32 and 4820 steels were quenched directly after carburizing at 925 °C (1700 °F
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