Issue 50

K. Singh et alii, Frattura ed Integrità Strutturale, 50 (2019) 319-330; DOI: 10.3221/IGF-ESIS.50.27 328 are simulated, and results are post-processed to fit the Weibull distribution, which quantifies a relative change in the local stress distribution at the microstructure level due to irradiation. Estimation of relative change in Weibull distribution parameters for irradiated material with respect to the non-irradiated case would be used in the MIBF model to predict the toughness behavior of the CT specimen of BCC material to get fracture response. A CKNOWLEDGMENT he present research work was jointly supported by Indira Gandhi Centre for Atomic Research-DAE, India and Jules Horowitz Reactor-CEA, France. We wish to thank Vincent Ludovic, Helfer Thomas, Pierre Forget, P.Puthiyavinayagam, K. Velusamy, S. Jalaldeen and R. Suresh Kumar for their kind help and technical support. R EFERENCES [1] Zinkle, S.J. and Matsukawa, Y. Observation and analysis of defect cluster production and interactions with dislocations, Journal of Nuclear Materials, 329-333 (2004), pp. 88–96. DOI: 10.1016/j.jnucmat.2004.04.298. [2] Larson B. C., Young, F. (1977). Effect of temperature on irradiation-induced dislocation loops in copper, Journal of Applied Physics, 48, pp. 880–886. DOI: 10.1063/1.323750. [3] Hardie, Christopher D., Williams, Ceri A., Xu, S., Roberts, Steve G. (2013). Effects of irradiation temperature and dose rate on the mechanical properties of self-ion implanted Fe and Fe–Cr alloys, Journal of Nuclear Materials, 439, pp. 33– 40. DOI: 10.1016/j.jnucmat.2013.03.052. [4] Balasubramanian, N. (1969). The temperature dependence of the dislocation velocity-stress exponent, Scripta Metallurgica, 3, pp. 21-24. DOI: 10.1016 /0036-9748(69)90171-9 . [5] Kubin, L., Devincre, B., Tang, M. (1998). Mesoscopic modelling and simulation of plasticity in fcc and bcc crystals: Dislocation intersections and mobility, Journal of Computer-Aided Materials Design, 5, pp. 31-54. DOI: 10.1023/A:1008648120261. [6] Roters, F., Eisenlohr, P., Hantcherli, L., Tjahjanto, D., Bieler, T., Raabe, D. (2010). Overview of constitutive laws, kinematics, homogenization and multiscale methods in crystal plasticity finite-element modeling: Theory, experiments, applications, Acta Materialia, 58, pp. 1152–1211. DOI: 10.1016/j.actamat.2009.10.058. [7] Singh, K., Robertson, C., Bhaduri, A.K. (2017). Assessing the Irradiation Defect Induced Changes using Dislocation Based Crystal Plasticity Model for BCC Materials, Procedia Structural Integrity, 5, pp. 294–301. DOI: 10.1016/j.prostr.2017.07.136. [8] Singh, K., Robertson, C., Bhaduri, A.K., Irradiation in BCC materials: Defect-induced changes of the effective dislocation mobility and their relation with the dose-dependent fracture response, Manuscript submitted for publication. [9] Singh, K., Robertson, C., Bhaduri, A.K., Irradiation dose and temperature effects on BCC material with dislocation based crystal plasticity, Manuscript submitted for publication. [10] Forget, P., Marini, B., Vincent, L. (2016). Application of local approach to fracture of an RPV steel: effect of the crystal plasticity on the critical carbide size, Procedia Structural Integrity, 2, pp. 1660-1667. DOI: 10.1016/j.prostr.2016.06.210. [11] Monnet, G., Vincent, L., Devincre, B. (2013). Dislocation-dynamics based crystal plasticity law for the low and high- temperature deformation regimes, Acta Materialia, 61, pp. 6178-6190. DOI: 10.1016/j.actamat.2013.07.002 [12] Li, Y., Robertson, C. (2018). Irradiation defect dispersions and effective dislocation mobility in strained ferritic grains: a statistical analysis based on 3D dislocation dynamics simulations, Journal of Nuclear Materials, 504, pp. 84-93. DOI: 10.1016/j.jnucmat.2018.03.026. [13] Taylor, G. (1934). The Mechanism of Plastic Deformation of Crystals. Part I – Theoretical', Proc. of the Royal Society of Landon. Series A, Containing Papers of Mathematical and Physical Character, 145, pp. 362–387. DOI: 10.1098/rspa.1934.0106. [14] Besinski, Z. (1974). Forest hardening in face centred cubic metals, Scripta Metallurgica, 8, pp. 1301-1308. [15] Franciosi, P., Berveiller, M., Zaoui, A (1980). Latent hardening in copper and aluminium single crystals, Acta Metallurgica, 28, pp. 273-283. DOI: 10.1016/0001-6160(80)90162-5. [16] Peirce, D., Asaro, R., Needleman, A. (1981). An analysis of nonuniform and localized deformation in ductile single crystals, Division of Engineering,Brown University, Providence. RI 02912. U.S.A. [17] Devincre, B., Hoc, T., Kubin, L. P. (2005). Collinear interaction of dislocation and slip systems, Materials Science and Engineering A, vol 400-401, pp. 182-185. DOI: 10.1016/j.msea.2005.02.071 T