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power-law breakdown

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By Sammy Tin
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005404
EISBN: 978-1-62708-196-2
... known as constitutive equations that relate the dependence of stress, temperature, and microstructure on deformation. The article reviews the characteristics of creep deformation and mechanisms of creep, such as power-law creep, low temperature creep, power-law breakdown, diffusional creep, twinning...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003288
EISBN: 978-1-62708-176-4
... Creep Rates Deformation-Mechanism Maps Power-Law Breakdown Stress and Temperature Dependence of Time to Rupture Direction of Loading Test Specimens Environment Constant Load versus Constant Stress Testing Engineering Strain versus True Strain Microstructure Interrupted...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003287
EISBN: 978-1-62708-176-4
... = 10 −3 (or a normalized shear stress, τ/ G = 10 −3 ), the creep rate begins to increase more strongly with applied stress. From the perspective of power law creep, this region is described as power law breakdown and can be described mathematically by an exponential or hyperbolic sine function...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002475
EISBN: 978-1-62708-194-8
... the wire. The value of the current can be expressed as (Ohm's Law): (Eq 1) I = V R (Eq 2) V = I R (Eq 3) R = ρ l A (Eq 4) ρ = R A l where R is the electrical (Ohmic) resistance of the wire, in Ω; ρ is the electrical resistivity of the wire material, in Ω...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003026
EISBN: 978-1-62708-200-6
... Electrical Conductivity in Heterogeneous Solids with Cylindrical Conductive Inclusions , Phys. Rev. B , Vol 35 ( No. 7 ), 1987 , p 3284 10.1103/PhysRevB.35.3284 20. “Test Methods for Dielectric Breakdown Voltage and Dielectric Strength of Solid Insulating Materials at Commercial Power...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005609
EISBN: 978-1-62708-174-0
... by the enclosed region shown and noting that solidification starts at the cell core (where f s = 0) and finishes at the cell boundary when two cells meet ( f s = 1). Fig. 22 Influence of heat-source power and travel speed on stray grain formation for alloy CMSX-4 for (a) laser welds and (b) gas...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002373
EISBN: 978-1-62708-193-1
... dents and deep scratches. Surface defects not only cause asperity contact in thin-film lubrication, but dents have been shown to disturb the EHD film and cause local film breakdown. The possibility of a fatigue limit for rolling contact (deviation from the inverse load power law) has been...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004115
EISBN: 978-1-62708-184-9
... wrong. Must go from B to A 2 −890 −840 B to A Bond may control interference if enough current can be drained. Fig. 15 Mitigation bonds for a transit system (reverse current switches often put in bond back to power supply) Fig. 16 Alternating current voltage protection during...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005683
EISBN: 978-1-62708-198-6
... of the passivating implants to localized forms of corrosion attack, especially pitting. The development of a standard for testing of small implants (ASTM F 2129) has played an important role in making the more recently published data comparable. The predicting power of the in vitro data for the in vivo behavior...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001233
EISBN: 978-1-62708-170-2
...) Drilling of curvilinear holes. (h) Deburring and radiusing. (i) Electropolishing The rate of material removal in ECM is governed by Faraday's law, since it is a function of current. The primary variables that affect the current density and the material removal rate are: Voltage Feed rate...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005508
EISBN: 978-1-62708-197-9
... ¯ d ε ¯ e − ε ¯ − σ ¯ e − ε ¯ ) or (Eq 7) d σ ¯ d ε ¯ = σ ¯ Very often, the flow stress curve (or simply flow curve) obtained at room temperature can be expressed in the form of a power law relation between stress and strain: (Eq 8...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003586
EISBN: 978-1-62708-182-5
...</italic> used in <xref rid="a0003586-e36" ref-type="disp-formula">Eq 36</xref> for desired penetration law units and mass-loss rate units Table 3 Constants K used in Eq 36 for desired penetration law units and mass-loss rate units Corrosion rate units desired Constant K in corrosion rate...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003805
EISBN: 978-1-62708-183-2
... are misleading, especially when the exposure time is short, because the long-term rate of attack can be considerably lower. The atmospheric corrosion rate law is most commonly expressed in the form ( Ref 18 , 19 ): (Eq 1) Δ W = K t n where Δ W is the loss in mass or thickness of metal due...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002471
EISBN: 978-1-62708-194-8
.... , Pitting Corrosion of Metals , NACE , 1986 29. Ford F.P. , “Mechanisms of Environmental Cracking Peculiar to the Power Generation Industry,” Report NP2589, EPRI , 1982 30. Ford F.P. , Stress Corrosion Cracking , Corrosion Processes , Parkins R.N. , Ed., Applied...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002161
EISBN: 978-1-62708-188-7
...Abstract Abstract This article describes the various characteristics of electrochemical grinding (ECG). It discusses grinding methods that can be performed with ECG components, namely, the electrolyte delivery and circulating system, the electrolyte, the DC power supply, grinding wheel...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005793
EISBN: 978-1-62708-165-8
... Parameters Surface Condition Temperature Composition of Atmosphere/Gas Flow Rate Pressure Voltage, Current, Pulse—Power Density The plasma carburizing process is not sensitive to surface contamination. Heavily rusted samples can lead to a decrease in carbon uptake, but contamination...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006644
EISBN: 978-1-62708-213-6
... Junction Rectifiers , Symp. E: Power Semiconductor Materials and Devices, Mater. Res. Soc. Symp. Proc. , Vol 483 , Pearton S.J. et al. , Ed., Materials Research Society , Warrendale, PA , 1998 , p 285 – 294 10.1557/PROC-483-285 29. Black D.R. and Long G.G. , “ X-Ray...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006384
EISBN: 978-1-62708-192-4
... geometry and consequently its aggressiveness. Several analytical expressions have been proposed to approximate mass loss curves, including Gaussian and/or power laws ( Ref 7 ). Figure 15 presents mass loss curves for three different metallic alloys. It can be observed that the smaller the incubation...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
...Abstract Abstract This article focuses on the life assessment methods for elevated-temperature failure mechanisms and metallurgical instabilities that reduce life or cause loss of function or operating time of high-temperature components, namely, gas turbine blade, and power plant piping...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002160
EISBN: 978-1-62708-188-7
... completion of the feed travel. The tool can be made of brass, bronze, copper, stainless steel, Monel, titanium, a sintered copper-tungsten alloy, or aluminum. The workpiece must be electrically conductive. Equipment Power Supplies The rate of material removal in electrochemical machining...