Some Families of Compound and Generalized Distributions

Gurland, John

doi:10.21236/ad0401218

Cited by 7 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it should be noted that for these materials the trend of increasing 6 /D correlates with diminishing size of the carbide particles. Since GURLAND and PLATEAU (1963) and other have noted that larger particles crack earlier than smaller particles, the increasing toughness relative to the prediction of RJ seems to be readily explainable.…”

Section: Fracture Models Based On the Void Growth Modelmentioning

confidence: 81%

“…Although void nucleation is the subject of a great deal of research (e.g. GURLAND andPLATEAU (1963), ASHBY (1966), TANAKA, MORI and NAKAMURA (1971) and ARGON and IM (1975)), the results…”

Section: Void Growth Near the Crack Tip And Fracture Initiationmentioning

confidence: 99%

“…11 6 12, the voids off the crack line will be reduced in size more than those on the crack line. GURLAND (1963) has suggested that a critical plastic strain 4 (equivalent to a critical shear stress), is necessary to nucleate voids from particles, and a consequence of this would be the nucleation of voids off the crack line, further from the crack tip, than on the crack line, except from the most tenacious of particles. Again all the growing voids will be reduced in size compared to figs.…”

Section: Crack-void Coalescence and Void Nucleationmentioning

confidence: 99%

See 2 more Smart Citations

Finite deformation analysis of crack tip opening in elastic-plastic materials and implications for fracture initiation

McMeeking¹

1976

View full text Add to dashboard Cite

Section: Fracture Models Based On the Void Growth Modelmentioning

confidence: 81%

“…Although void nucleation is the subject of a great deal of research (e.g. GURLAND andPLATEAU (1963), ASHBY (1966), TANAKA, MORI and NAKAMURA (1971) and ARGON and IM (1975)), the results…”

Section: Void Growth Near the Crack Tip And Fracture Initiationmentioning

confidence: 99%

Section: Crack-void Coalescence and Void Nucleationmentioning

confidence: 99%

See 1 more Smart Citation

Finite deformation analysis of crack tip opening in elastic-plastic materials and implications for fracture initiation

McMeeking¹

1976

View full text Add to dashboard Cite

“…In the precipitatestrengthened alloys, the effects of precipitate size on ductility has not been completely established nor is it clear whether or not the precipitate size dependence is related to the absolute size or the inter-particle spacing. Theoretical analyses of Ashby [27] and Gurland [28] would indicate that the ductility should increase as the precipitate size decreases. It is suggested that once the precipitate size is reduced below a certain number, the inter-particle spacing will serve to limit the length of the slip bands.…”

Section: B225 Effects Of Primary Precipitate Size and Inter-particmentioning

confidence: 99%

Computational and Experimental Design of Fe-Based Superalloys for Elevated-Temperature Applications

Liaw

Fine

Ghosh

et al. 2012

View full text Add to dashboard Cite

Analogous to nickel-based superalloys, Fe-based superalloys, which are strengthened by coherent B2type precipitates are proposed for elevated-temperature applications. During the period of this project, a series of ferritic superalloys have been designed and fabricated by methods of vacuum-arc melting and vacuum-induction melting. Nano-scale precipitates were characterized by atom-probe tomography, ultrasmall-angle X-ray scattering, and transmission-electron microscopy. A duplex distribution of precipitates was found. It seems that ferritic superalloys are susceptible to brittle fracture. Systematic endeavors have been devoted to understanding and resolving the problem. Factors, such as hot rolling, precipitate volume fractions, alloy compositions, precipitate sizes and inter-particle spacings, and hyperfine cooling precipitates, have been investigated. In order to understand the underlying relationship between the microstructure and creep behavior of ferric alloys at elevated temperatures, in-situ neutron studies have been carried out. Based on the current result, it seems that the major role of β΄ with a 16%-volume fraction in strengthening ferritic alloys is not load sharing but interactions with dislocations. The oxidation behavior of one ferritic alloy, FBB8 (Fe-6.5Al-10Ni-10Cr-3.4Mo-0.25Zr-0.005B, weight percent), was studied in dry air. It is found that it possesses superior oxidation resistance at 1,023 and 1,123 K, compared with other creep-resistant ferritic steels [T91 (modified 9Cr-1Mo, weight percent) and P92 (9Cr-1.8W-0.5Mo, weight percent)]. At the same time, the calculation of the interfacial energies between the -iron and B2-type intermetallics (CoAl, FeAl, and NiAl) has been conducted.

show abstract

“…The coarse iron-rich and silicon-rich constituent particles and traces of magnesium-rich insoluble phases tend to either crack easily because of their intrinsic brittleness or decohere at their interfaces (Ref [34][35][36]. Interracial strength is a dominant factor in the nucleation of the microscopic voids.…”

Section: Discussionmentioning

confidence: 99%

Mechanisms governing deformation and damage during elevated-temperature fatigue of an aluminum-magnesium-silicon alloy

Srivatsan

Anand

Narendra

1997

J. of Materi Eng and Perform

View full text Add to dashboard Cite

The cyclic deformation and fracture characteristics of aluminum alloy 6061 are presented and discussed. The specimens were cyclically deformed using fully reversed tension-compression loading under total strain-amplitude control, over a range of temperatures. The alloy showed evidence of softening to failure at all test temperatures. The degree of softening during fully reversed deformation increased with test temperature. The presence of shearable matrix precipitates results in a microstructure that offers a local decrease in resistance to dislocation movement, causing a progressive loss of strengthening contributions to the matrix. At elevated temperatures, localized oxidation and embrittlement at the grain boundaries are exacerbated by the applied cyclic stress and play an important role in accelerating crack initiation and subsequent crack propagation. The fracture behavior of the alloy is discussed in light of competing influences of intrinsic microstructural effects, deformation characteristics arising from a combination of mechanical and microstructural contributions, cyclic plastic strain amplitude and concomitant response stress, and the test temperature. I

show abstract

Some Families of Compound and Generalized Distributions

Cited by 7 publications

References 18 publications

Finite deformation analysis of crack tip opening in elastic-plastic materials and implications for fracture initiation

Finite deformation analysis of crack tip opening in elastic-plastic materials and implications for fracture initiation

Computational and Experimental Design of Fe-Based Superalloys for Elevated-Temperature Applications

Mechanisms governing deformation and damage during elevated-temperature fatigue of an aluminum-magnesium-silicon alloy

Contact Info

Product

Resources

About