The threshold stress and departure side pinning of dislocations by dispersoids

Nardone, Vincent C.; Matejczyk, D. E.; Tien, J. K.

doi:10.1016/0001-6160(84)90097-x

Cited by 58 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For grain boundary stabilization, coherent dispersoids are more effective than incoherent dispersoids [60,61]. For dislocation pinning, incoherent Y 2 Ti 2 O 7 dispersoids can be less attractive to dislocations due to a repulsive contribution caused by the oxide's large elastic modulus when compared to the Fe-Cr matrix [57,58,62,63].…”

Section: Discussionmentioning

confidence: 99%

Temperature dependent dispersoid stability in ion-irradiated ferritic-martensitic dual-phase oxide-dispersion-strengthened alloy: Coherent interfaces vs. incoherent interfaces

et al. 2016

View full text Add to dashboard Cite

a b s t r a c tIn this study, the microstructure of a 12Cr ferritic-martensitic oxide-dispersion-strengthened (ODS) alloy is studied before and after Fe ion irradiation up to 200 peak displacements per atom (dpa). Irradiation temperature ranges from 325 to 625 C. Before irradiation, both coherent and incoherent dispersoids exist in the matrix. In response to irradiation, the mean sizes of dispersoids in both the ferrite and tempered martensite phases change to equilibrium values that increase with irradiation temperature. The evolution of dispersoids under irradiation is explained by a competition between athermalradiation-driven shrinkage and thermal-diffusion-driven growth, with interface coherency affecting the growth mechanism. However, each coherency type exhibits different evolution behavior under irradiation. Coherent dispersoids, regardless of their initial size, change toward an equilibrium size at each temperature tested. On the other hand, incoherent dispersoids are destroyed at lower test temperatures but survive while shrinking in size at higher temperatures. This difference in behavior can be explained by the lower interfacial energy of coherent dispersoids in comparison with incoherent dispersoids. This study sheds light on the roles of interface configurations in maintaining dispersoid integrity under irradiation.

show abstract

Section: Discussionmentioning

confidence: 99%

Temperature dependent dispersoid stability in ion-irradiated ferritic-martensitic dual-phase oxide-dispersion-strengthened alloy: Coherent interfaces vs. incoherent interfaces

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Thus, the yield stress seems strongly to depend on the interparticle distance as well as the radius of the particle. Transmission Electronic Microscopic studies [51] seem to support these conclusions.…”

Section: Precipitation Hardening Modelingmentioning

confidence: 85%

Formation of Y2O3 nanoclusters in nano-structured ferritic alloys: Modeling of precipitation kinetics and yield strength

Hin

Wirth

2010

Journal of Nuclear Materials

View full text Add to dashboard Cite

“…[13][14][15][16][17] V.C. Nardone and J.K. Tien 13 were the first to use the term "departure side pinning" in the early 1980s.…”

Section: Transmission Electron Microscopy Of Dislocation-particle Intmentioning

confidence: 99%

“…Nardone et al 14 and E. Arzt and D.S. Wilkinson 20 have proposed models based on the assumption that the elastic energy of the dislocation is lower in the matrix-particle interface.…”

Section: Energy Reduction Modelmentioning

confidence: 99%

Dislocation-particle interaction at elevated temperatures

Mishra

2009

JOM

View full text Add to dashboard Cite

The threshold stress and departure side pinning of dislocations by dispersoids

Cited by 58 publications

References 24 publications

Temperature dependent dispersoid stability in ion-irradiated ferritic-martensitic dual-phase oxide-dispersion-strengthened alloy: Coherent interfaces vs. incoherent interfaces

Temperature dependent dispersoid stability in ion-irradiated ferritic-martensitic dual-phase oxide-dispersion-strengthened alloy: Coherent interfaces vs. incoherent interfaces

Formation of Y2O3 nanoclusters in nano-structured ferritic alloys: Modeling of precipitation kinetics and yield strength

Dislocation-particle interaction at elevated temperatures

Contact Info

Product

Resources

About