Irradiation-induced grain growth in nanocrystalline reduced activation ferrite/martensite steel

Liu, W. B.; Zhang, C.; Ji, Yanzhou; Yang, Zhigang; Zang, Hang; Shen, Tielong; Chen, Lei

doi:10.1063/1.4896677

Cited by 18 publications

(10 citation statements)

References 31 publications

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“…In experiment, a significant grain growth due to irradiation was observed in nanocrystalline RAFM steels [54]. It has also been shown that He atoms aggregate in defects (point defect, grain boundary) to form bubbles in structural materials that result in void swelling and embrittlement [13,55,56].…”

Section: Vacancy Trapping For Multiple He In Presence Of Cr and Wmentioning

confidence: 96%

Effects of Cr and W additions on the stability and migration of He in bcc Fe: A first-principles study

Ding

et al. 2016

Computational Materials Science

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Section: Vacancy Trapping For Multiple He In Presence Of Cr and Wmentioning

confidence: 96%

Effects of Cr and W additions on the stability and migration of He in bcc Fe: A first-principles study

Ding

et al. 2016

Computational Materials Science

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“…The incoherent shaped structures which are randomly distributed all over the surface have been transformed into granular morphology with distinct grain boundaries. Similar kind of structures by ion implantation on different metals have been reported previously by Mallick et al, Kaoumi et 31,33,34 The grain morphology is explained on the basis of thermal spike model. 33,34 The ion induced thermal spikes and their size play a central role in grain morphological process.…”

Section: B Surface Morphology Of Brass Substratesmentioning

confidence: 51%

“…Similar kind of structures by ion implantation on different metals have been reported previously by Mallick et al, Kaoumi et 31,33,34 The grain morphology is explained on the basis of thermal spike model. 33,34 The ion induced thermal spikes and their size play a central role in grain morphological process. At increased in dose, temperature of surface and impacts of thermal spike also increase significantly.…”

Section: B Surface Morphology Of Brass Substratesmentioning

confidence: 51%

“…The migration of grain boundaries is a recrystallization phenomenon which takes place during ion irradiation in order to minimize the surface energy and stored strain field. 34 Therefore, the mobility of the Primary Knock-on Atoms (PKA) and implanted ions increases and easily crosses the intrinsic stain field and causes reorientation of lattice leading to small and smooth grains. The period of thermal spike only exists for few picoseconds before being quenched to ambient temperature.…”

Section: B Surface Morphology Of Brass Substratesmentioning

confidence: 99%

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Modifications in surface, structural and mechanical properties of brass using laser induced Ni plasma as an ion source

et al. 2016

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Laser induced Ni plasma has been employed as source of ion implantation for surface, structural and mechanical properties of brass. Excimer laser (248 nm, 20 ns, 120mJ and 30 Hz) was used for the generation of Ni plasma. Thomson parabola technique was employed to estimate the energy of generated ions using CR39 as a detector. In response to stepwise increase in number of laser pulses from 3000 to 12000, the ion dose varies from 60 × 1013 to 84 × 1016 ions/cm2 with constant energy of 138 KeV. SEM analysis reveals the growth of nano/micro sized cavities, pores, pits, voids and cracks for the ion dose ranging from 60 × 1013 to 70 × 1015 ions/cm2. However, at maximum ion dose of 84 × 1016 ions/cm2 the granular morphology is observed. XRD analysis reveals that new phase of CuZnNi (200) is formed in the brass substrate after ion implantation. However, an anomalous trend in peak intensity, crystallite size, dislocation line density and induced stresses is observed in response to the implantation with various doses. The increase in ion dose causes to decrease the Yield Stress (YS), Ultimate Tensile Strength (UTS) and hardness. However, for the maximum ion dose the highest values of these mechanical properties are achieved. The variations in the mechanical properties are correlated with surface and crystallographical changes of ion implanted brass.

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“…In addition, the increase of average grain size from 40 nm to 60 nm was observed in the NS austenite steel SW316SS after irradiated with Fe ions [74]. Irradiation induced grain growth was also reported in NS ferrite/martensite steel produced by surface mechanical attrition treatment (SMAT) [75]. Moreover, irradiation induced grain growth has also been widely observed in nanocrystalline thin films (for example, Zr NS film [76], Fe/Fe (Zr) NS films [77], Ni film [78], Pd film [79], Zr-Fe NS film [80] and Zr, Pt, Cu, and Au NS films [81]).…”

Section: Irradiation Resistance Of Ns Materialsmentioning

confidence: 99%

Irradiation Induced Microstructure Evolution in Nanostructured Materials: A Review

Liu

Tan

et al. 2016

Materials

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Nanostructured (NS) materials may have different irradiation resistance from their coarse-grained (CG) counterparts. In this review, we focus on the effect of grain boundaries (GBs)/interfaces on irradiation induced microstructure evolution and the irradiation tolerance of NS materials under irradiation. The features of void denuded zones (VDZs) and the unusual behavior of void formation near GBs/interfaces in metals due to the interactions between GBs/interfaces and irradiation-produced point defects are systematically reviewed. Some experimental results and calculation results show that NS materials have enhanced irradiation resistance, due to their extremely small grain sizes and large volume fractions of GBs/interfaces, which could absorb and annihilate the mobile defects produced during irradiation. However, there is also literature reporting reduced irradiation resistance or even amorphization of NS materials at a lower irradiation dose compared with their bulk counterparts, since the GBs are also characterized by excess energy (compared to that of single crystal materials) which could provide a shift in the total free energy that will lead to the amorphization process. The competition of these two effects leads to the different irradiation tolerance of NS materials. The irradiation-induced grain growth is dominated by irradiation temperature, dose, ion flux, character of GBs/interface and nanoprecipitates, although the decrease of grain sizes under irradiation is also observed in some experiments.

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Irradiation-induced grain growth in nanocrystalline reduced activation ferrite/martensite steel

Cited by 18 publications

References 31 publications

Effects of Cr and W additions on the stability and migration of He in bcc Fe: A first-principles study

Effects of Cr and W additions on the stability and migration of He in bcc Fe: A first-principles study

Modifications in surface, structural and mechanical properties of brass using laser induced Ni plasma as an ion source

Irradiation Induced Microstructure Evolution in Nanostructured Materials: A Review

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