The relation between minimum creep rate and time to fracture

Dobeš, F.; Milička, K.

doi:10.1080/03063453.1976.11683560

Cited by 224 publications

(73 citation statements)

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“…Although the magnitude of m given by equation (4) is consistent with other values reported in the literature, the value of C* is significantly higher than other observed data by one to two orders of magnitude [22][23][24][25]. Alternatively, the data shown in figure 4 It is interesting to note that the data obtained at 1000 K lie predominantly on the plot described by equation (4c).…”

Section: Monkman-grant Plot and Creep Ductilitysupporting

confidence: 70%

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Tensile creep fracture of polycrystalline near-stoichiometric NiAl

Raj

2004

Materials Science and Engineering: A

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Section: Monkman-grant Plot and Creep Ductilitysupporting

confidence: 70%

“…The experimental values of m and C* were observed to be 0.77 to 1.0 and 0.05 to 2.0, respectively, for several different metals and alloys [22][23][24][25]. In practice, equation (3) is often simplified to f t ε ≈ C MG , where C MG = C* is known as the Monkman-Grant constant with m = 1.…”

Section: Monkman-grant Plot and Creep Ductilitymentioning

confidence: 99%

Tensile creep fracture of polycrystalline near-stoichiometric NiAl

Raj

2004

Materials Science and Engineering: A

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“…Dobes and Milicka [34] argued that the value of C MG and m changed according to the applied stress in contrast to the studies of Davies and Wilshire [32] and Chih-Kuang Lin [31] who previously found that the value of C MG was dependent on stress and/or temperature. Therefore, Dobes and Milicka modified the Monkman-Grant relation into the form [34]:…”

Section: Review Of the Monkman-grant (Mg) Methodologycontrasting

confidence: 49%

Creep Lifing Models and Techniques

Abdallah¹,

Perkins²,

Arnold³

2018

Creep

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The deformation of structural alloys presents problems for power plants and aerospace applications due to the demand for elevated temperatures for higher efficiencies and reductions in greenhouse gas emissions. The materials used in such applications experience harsh environments which may lead to deformation and failure of critical components. To avoid such catastrophic failures and also increase efficiency, future designs must utilise novel/improved alloy systems with enhanced temperature capability. In recognising this issue, a detailed understanding of creep is essential for the success of these designs by ensuring components that do not experience excessive deformation which may ultimately lead to failure. To achieve this, a variety of parametric methods have been developed to quantify creep and creep fracture in high temperature applications. This study reviews a number of well-known traditionally employed creep lifing methods with some more recent approaches also included. The first section of this paper focuses on predicting the long-term creep-rupture properties which is an area of interest for the power generation sector. The second section looks at pre-defined strains and the re-production of full creep curves based on available data which is pertinent to the aerospace industry where components are replaced before failure.

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“…The data for many materials is better fitted by the modified Monkman-Grant relationship (MMGR) [22] t r _ e m 0…”

Section: Initial Microstructurementioning

confidence: 99%

Creep and fracture behavior of as-cast Mg–11Y–5Gd–2Zn–0.5Zr (wt%)

et al. 2012

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The tensile-creep and creep-fracture behavior of as-cast Mg-11Y-5Gd-2Zn-0.5Zr (wt%) (WGZ1152) was investigated at temperatures between 523 and 598 K (0.58-0.66T m ) and stresses between 30 and 140 MPa. The creep stress exponent was close to five, suggesting that dislocation creep was the dominant creep mechanism. The activation energy for creep (233 ± 18 kJ/mol) was higher than that for self-diffusion in magnesium, and was believed to be associated with cross-slip, which was the dominant thermally-aided creep mechanism. This was consistent with the surface observations, which suggested non-basal slip and cross-slip were active at 573 K. The minimum creep rate and fracture time values fit the original and modified Monkman-Grant models. In situ creep experiments highlighted the intergranular cracking evolution. The creep properties and behavior were compared with those for other high-temperature creep-resistant Mg alloys such as WE54-T6 and HZ32-T5.

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The relation between minimum creep rate and time to fracture

Cited by 224 publications

References 0 publications

Tensile creep fracture of polycrystalline near-stoichiometric NiAl

Tensile creep fracture of polycrystalline near-stoichiometric NiAl

Creep Lifing Models and Techniques

Creep and fracture behavior of as-cast Mg–11Y–5Gd–2Zn–0.5Zr (wt%)

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