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decohesions

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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 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...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
... to corrosive environments also is often difficult because of interactions of fracture mechanisms or because fractures generated by different mechanisms have similar appearances. INTERGRANULAR FRACTURE is the decohesion that may occur along a weakened grain boundary. Typically, the grain boundaries...
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
... or environmental factors that cause grain boundaries to become the preferred path of crack growth. In general, IG fractures are classified and termed as one of three: INTERGRANULAR FRACTURE is decohesion that occurs along a grain boundary. Intergranular fracture is often associated with the presence...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002361
EISBN: 978-1-62708-193-1
... embrittlement appears to be divided into five types of mechanisms: Decohesion Pressure Adsorption Deformation Brittle hydride The balance between various phenomena is very difficult to sort out. Many researchers think that dissolution and hydrogen-induced cracking processes...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000600
EISBN: 978-1-62708-181-8
... alloys and engineered materials are also illustrated. cleavage decohesive rupture dimple rupture fatigue fraction ferrous metals fractographs nonferrous metals THIS ATLAS provides a collection of fractographs that is intended to assist the reader in recognizing the features of fracture...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000616
EISBN: 978-1-62708-181-8
... fracture. Note grain-boundary, decohesion. SEM, 23× (E.A. Schwarzkopf, J. Stefani, and J.K. Tien, Columbia University) Fig. 835 Segment of a fractured second-stage gas-turbine wheel, cast from alloy 713C, that broke from fatigue in service. (About half of the disk portion of the wheel was never...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003468
EISBN: 978-1-62708-195-5
... on the matrix is reduced. This increases the fatigue life. The opposite occurs under strain control. In this case, the strain is the same in both materials, but the stress is higher in the MMC. This increases the probability of reinforcement fracture or decohesion, which, in turn, encourages the initiation...
Book Chapter

By Bruce Craig
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003634
EISBN: 978-1-62708-182-5
...., Hydrogen Effects in Materials , TMS/AIME , 1996 Pressure Theory Surface Adsorption Theory Decohesion Enhanced Plastic Flow and Instability Hydride Formation Hydrogen Attack Hydrogen Trapping Pure Irons Ferrous Alloys Stainless Steels Hydrogen Environment Embrittlement...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... and second-phase particles) when the matrix material separates from the particle by interfacial decohesion or when the inclusion or second-phase fractures. The level of extensional growth of the microvoids is dependent on the level of plastic strain the material can undergo prior to fracture...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003635
EISBN: 978-1-62708-182-5
... failure of the specimen. Fig. 7 Schematic illustrating displacement of atoms at the crack tip. The bond A-A 0 constitutes the crack tip, and B is the liquid metal atom. In the previously mentioned mechanism, it is assumed that tensile decohesion is predominantly responsible...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001348
EISBN: 978-1-62708-173-3
... A. , An Analysis of Tensile Decohesion Along an Interface , J. Mech. Phys. Solids , Vol 38 ( No. 3 ), 1990 , p 289 – 324 10.1016/0022-5096(90)90001-K 86. Rose J.H. , Ferrante J. , and Smith J.R. , Universal Binding Energy Curves for Metals and Bimetallic Interfaces , Phys. Rev. Lett...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... rupture due to MVC is the most prevalent fracture mechanism of ductile overload failures. During deformation, cavities (or microvoids) nucleate at small particles (such as inclusions and second-phase particles) when the matrix material separates from the particle by interfacial decohesion and when...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... stringers. If the material is quenched and tempered, debonding and fracture of carbide occurs at a greater strain. Particles that are totally or partially coherent with the matrix (e.g., carbides in steel) require development of substantial stress for decohesion to start at the particle-matrix interface...
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
... of substantial stress for decohesion to start at the particle-matrix interface. Careful work using steels containing small, spheroidized carbides and (typical) MnS inclusions shows that debonding occurs first around the larger and more weakly bonded MnS inclusions and at a greater strain by debonding...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002353
EISBN: 978-1-62708-193-1
... boundary, and form a slip band, a cracked particle, decohesion between particle and matrix, or decohesion along the grain boundary. The initial cracks are very small. Their size is not known well because it is difficult to determine when a slip band or other deformation feature becomes a crack...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003792
EISBN: 978-1-62708-177-1
... 12 ). The nominal mechanical properties of as-cast Co/Cr/Mo alloys can be improved by hot isostatic pressing (HIP) and annealing, as shown in Fig. 8 . The HIP process reduces the solidification porosity and decohesion present between the carbides and the matrix material that are inherent with cast...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... the material strength or otherwise embrittles the material is not entirely known or necessarily explained by one mechanism, such as the decohesive theory previously noted ( Ref 1 , 2 ). Many people who are involved for the first time in a hydrogen embrittlement problem may wonder why there is a sustained...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002351
EISBN: 978-1-62708-193-1
... Propagation Cleavage Microvoid Coalescence Boundary Decohesion Phase Changes during Deformation Effects of Microstructure Effects of Environment Texture Effects Damage Accumulation at Crack Tip Reduced Crack Growth Rate by Crack Tip Interference (Roughness-Induced Closure...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
... or otherwise embrittles the material is not entirely known or necessarily explained by one mechanism, such as the decohesive theory previously noted ( Ref 1 , 2 ). Many people who are involved for the first time in a hydrogen embrittlement problem may wonder why there is a sustained tensile stress before...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000603
EISBN: 978-1-62708-181-8
... of transition zone. Visible features include nodule decohesion and microplastic deformation and tearing ahead of the primary crack front. SEM, 1,100× (R.C. Voigt and L.M. Eldoky, University of Kansas) Fig. 92 Fracture surface of a ferritic-pearlitic ductile iron. Note ductile fracture of ferrite...