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dynamic fracture toughness

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... dynamics of a fracture event (quasi-static versus dynamic/impact loading) In this article, the basic types of fracture processes (ductile, brittle, fatigue, and creep) are described briefly, principally in terms of fracture appearances (as sometimes affected by the microstructure). More in-depth...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... numbering in the hundreds of thousands and millions, results in initiation and gradual propagation of a crack or cracks. Complete fracture ensues when the crack reaches a critical size that is dependent on fracture toughness. Fatigue is an important potential cause of mechanical failure, because most...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... materials can have toughness levels that result in critical flaw sizes ( a c ) on the order of manufacturing and processing imperfections and even significantly smaller, as in quenched and tempered steels. The critical flaw size for macroscale (plane-strain) brittle fracture is: a = 2.5 ( K Ic...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001831
EISBN: 978-1-62708-181-8
... Abstract This article begins with a discussion of the basic fracture modes, including dimple ruptures, cleavages, fatigue fractures, and decohesive ruptures, and of the important mechanisms involved in the fracture process. It then describes the principal effects of the external environment...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003241
EISBN: 978-1-62708-199-3
... Abstract This article reviews the various types of mechanical testing methods, including hardness testing; tension testing; compression testing; dynamic fracture testing; fracture toughness testing; fatigue life testing; fatigue crack growth testing; and creep, stress-rupture, and stress...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... deformation of a metallurgical structure that results in unsatisfactory mechanical properties, such as poor fracture toughness or fatigue resistance, can be considered to be a limit on workability. Generally, workability depends on the local conditions of stress, strain, strain rate, and temperature in...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
...) Load exceeded the dynamic strength of the part Check for proper alloy and processing, as well as proper toughness, grain size Loading direction can show failure was secondary or impact induced Low temperatures Cyclic stress exceeded the endurance limit of the material Check for...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005654
EISBN: 978-1-62708-198-6
... had fractured in serviceā€”a 316L dynamic compression plate, 316L and CP Ti bone screws, an intramedullary nail, a Ti-6Al-4V tibial tray, and a Co-Cr total hip prosthesis stem. None of the devices examined were found to be severely faulty in the metallurgical or engineering sense (i.e., defects in...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003025
EISBN: 978-1-62708-200-6
... se. However, they are widely believed to be more reliable than formal fracture toughness tests, simply because the deleterious effects of unfavorable flow geometries are more directly obvious in an impact test program than in fracture toughness tests, in which the sharp notch dominates the situation...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... Abstract Impact or percussive wear is defined as the wear of a solid surface that is due to percussion, which is a repetitive exposure to dynamic contact by another body. Impact wear, however, has many analogies to the field of erosive wear. The main difference is that, in impact wear...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003816
EISBN: 978-1-62708-183-2
...-corrosion cracking in various industrial and chemical environments. It concludes with a discussion on various corrosion testing methods, including aqueous corrosion testing, dynamic corrosion tests, and stress-corrosion testing. aqueous corrosion testing copper copper alloys dynamic corrosion tests...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003024
EISBN: 978-1-62708-200-6
... effect of viscoelasticity on the test methods used. Two common ways of evaluating viscoelasticity of plastics are by means of creep experiments and dynamic mechanical experiments. Graphic or tabular analysis of test data, time-temperature superposition, and empirical correlation methods are commonly...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000621
EISBN: 978-1-62708-181-8
... input of 0.74 kJ/mm (18.9 kJ/in.). Ductile fracture of the dynamic tear (DT) test sample occurred in the fusion zone due to softening of the zone and the presence of pores. Fig. 999 : Fracture surface of aluminum alloy 5456 DT sample. Large pore is surrounded by microvoids. Failure mode was microvoid...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000609
EISBN: 978-1-62708-181-8
... heat input of 0.83 kJ/mm (21.2 kJ/in.). Weldment toughness was measured at room temperature on a subsized 13-mm (0.5-in.) thick dynamic tear (DT) specimen notched in the weld. Solidification cracking of the hard and brittle fusion zone (untempered martensite) resulted in low toughness values typically...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000623
EISBN: 978-1-62708-181-8
... measuring 13 mm (0.5 in.) thick was welded using beam power of 8 kW, speed of 28 mm/s (65 in./min), and heat input of 0.29 kJ/mm (7.4 kJ/in.). Fig. 1122 : Fracture surface of the dynamic tear test specimen indicates 100% ductile rupture via microvoid coalescence. Mechanical properties of the weld were...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003104
EISBN: 978-1-62708-199-3
... heat treatment on fracture toughness of steels. carbon steels classification of wear effect of alloying elements fatigue failure forms of embrittlement fracture toughness low-alloy steels notch toughness wear resistance WEAR of metals occurs by the plastic displacement of surface...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003060
EISBN: 978-1-62708-200-6
... Abstract The design process for ceramic materials is more complex than that of metals because of low-strain tolerance, low fracture toughness and brittleness. The application of structural ceramics to engineering systems hinges on the functional benefits to be derived and is manifested in the...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005324
EISBN: 978-1-62708-187-0
..., fatigue properties, fracture toughness, and physical properties of ductile iron and compares them with other cast irons to aid the designer in materials selection. It concludes with information on austempered ductile iron. ductile iron castings austempered ductile iron compressive properties...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003061
EISBN: 978-1-62708-200-6
... parameters affecting wear of ceramics, namely, hardness, thermal conductivity, fracture toughness, and corrosion resistance. The next part of the article addresses temperature-resistant applications of advanced ceramics. Specific applications of ceramic materials addressed include cutting tools, pump and...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003108
EISBN: 978-1-62708-199-3
... approximate standard grades. Properties were obtained using test bars machined from 25 mm (1 in.) keel blocks. (a) 0.2% offset. (b) 0.0375% offset. (c) Calculated from tensile modulus and Poisson's ratio in tension Table 6 Fracture toughness of ductile iron Type of iron Condition...