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fracture toughness

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Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006270
EISBN: 978-1-62708-169-6
... life fracture toughness heat treatment mechanical properties pure titanium titanium alloys VARIOUS TYPES OF HEAT TREATMENTS are used to optimize the properties of titanium and titanium alloys. Not all heat treating cycles are applicable to all titanium alloys, and the response of titanium and...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005677
EISBN: 978-1-62708-198-6
... sealants, dental cements, porcelain and plastic denture teeth, dental feldspathic porcelain and ceramics, endodontic instruments, periodontal Instruments, and orthodontic wires. The article describes the correlations of properties, such as hardness, fracture toughness, and wear. It discusses wear mechanism...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005419
EISBN: 978-1-62708-196-2
... 3) d a d N = C Δ K n where C and n are constants that depend on material and loading conditions. Region III is the accelerating portion of the crack-growth curve that approaches the fracture toughness, K Ic , for the material. From a damage-tolerance point of view, this...
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...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005325
EISBN: 978-1-62708-187-0
... need for expensive alloying elements such as nickel, chromium, copper, and molybdenum Higher ratio of tensile strength to hardness Much higher ductility and toughness, which result in a higher safety margin against fracture Lower oxidation and growth at high temperatures Less section...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005323
EISBN: 978-1-62708-187-0
... fracture. This characteristic can be exaggerated by imposing a nonaxial load during tensile testing, resulting in statistical variations, which may not be a true measure of the quality of the iron. To overcome this tendency, many shops use self-aligning nonthreaded grips in the performance of tensile tests...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003995
EISBN: 978-1-62708-185-6
... and reviews how improvements in the strength and toughness depend on the synergistic effect of microalloy additions and on carefully controlled thermomechanical conditions. It discusses TMP variables and the general distinctions between conventional hot rolling and common types of controlled-rolling...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003817
EISBN: 978-1-62708-183-2
... other hand, investment casting allows the complete precipitation of Laves phase. Powder metallurgy processing, using rapidly cooled powders, can result in improved toughness. Welding with these alloys requires extreme care to prevent cracking. Preheating, temperature uniformity, and slowly cooling are...
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 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003224
EISBN: 978-1-62708-199-3
... fracture toughness of the material. Fracture toughness, in the most general of definitions, is the ability of a material to withstand fracture in the presence of cracks. The American Society for Testing and Materials (ASTM) has many commonly accepted standards for fracture testing, and defines fracture...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003058
EISBN: 978-1-62708-200-6
..., one of a number of controlled geometry fracture mechanics tests is used to measure the value of K I for crack propagation. The stress intensity value for catastrophic propagation is referred to as the critical stress intensity ( K Ic ), or the plane strain fracture toughness. The critical stress...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001241
EISBN: 978-1-62708-170-2
... contact between the tool and the work, or it may be due to the wear caused by the hard and abrasive chip after it is released from the work material. Toughness is the resistance to fracture. It is easier to propagate cracks or fracture through material of lower toughness. Hence, it is easier to machine...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000615
EISBN: 978-1-62708-181-8
..., fracture toughness, sulfidation corrosion failure, and interdendritic attack of gas sampling line couplings of coal-gasification pilot plants of these superalloys. couplings fractograph fracture modes fracture toughness iron-base alloys neutron irradiation effect sulfidation superalloys...
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
... is often associated with high energy absorption at fracture, and adequate toughness or ductility may be evaluated and defined by impact data, where criteria to determine whether the fracture is ductile or brittle involve some minimum level of absorbed energy at the service temperature of interest...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... is inaccurate. In application, consideration of the plane-strain state of stress is significant in understanding macroscale brittle fracture-surface orientation in tensile loading and the difference in fracture toughness for plane-stress and plane-strain loading (see the section “Fracture...
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: 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: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001832
EISBN: 978-1-62708-181-8
... preheated to about 95 °C (205 °F). The fracture is then immersed in the solution for about 30 min, rinsed in water then alcohol, and air dried. Figure 3(a) shows the condition of a laboratory-tested fracture toughness sample (AISI 1085 heat-treated steel) after it was intentionally corroded in a 5% salt...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... melting of the eutectic constituent occurs and can result in significantly reduced ductility and toughness. The presence of certain tramp elements at the grain boundaries of an alloy is one of the major causes of IG fracture. These elements are believed to lower the cohesive strength of the boundaries...
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...