Nanoindentation of model Fe–Cr alloys with self-ion irradiation

Hardie, Christopher D.; Roberts, Steve

doi:10.1016/j.jnucmat.2012.09.003

Cited by 69 publications

(34 citation statements)

References 23 publications

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“…The material and irradiation details are identical to that reported in [10], where full details have been given. Briefly, an Fe12%Cr alloy was manufactured by Cambridge Metals Crystals and Oxides (CMCO) with final cold rolling into sheet at a thickness of approximately 1mm.…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

“…Figure 2 shows a TEM cross-section of the radiation damage layer at the sample surface (as reported in ref. [10]). The micrograph includes the protective Pt layer deposited in the FIB before foil thinning, a region of dense dislocation loops forming the damage layer and the underlying un-irradiated substrate.…”

Section: Ion Implantationmentioning

confidence: 99%

“…In contrast, there are few methods available for the characterisation of mechanical properties from such small volumes of material, and analyses regarding best practise and validity of using these techniques for irradiated materials are scarce. There have been several investigations which have used nanoindentation as a means to measure the effects of ion irradiation on mechanical properties [1][2][3][4][5][6][7][8][9][10][11][12]. The majority of investigations have been conducted using a Berkovich tip geometry and include various methods such as load-unload [1,2] and continuous stiffness measurement (CSM) [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Understanding the effects of ion irradiation using nanoindentation techniques

Hardie

Roberts

Bushby

2015

Journal of Nuclear Materials

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101

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The effects of ion irradiation in materials for research are usually limited to a shallow surface layer of the order of one micrometre in depth. Determining the mechanical properties of such irradiated materials requires techniques with high spatial resolution. Nanoindentation is a relatively simple method for investigating these shallow layers with the advantage that statistically rich data sets for elastic and plastic property values can be generated. However, interpretation of the results requires and understanding of the material response, including the extent of the plastic zone with respect to the irradiated layer, pile-up or sink-in of material around the indentation site that affect the calculated contact area and hence derived mechanical property values. An Fe + self-irradiated Fe12%Cr alloy was investigated with three different indenter tip geometries, a Cube corner, Berkovich and 10 micron radius indenter. Sharp indenters provide sufficiently small plastic zones to be contained within the irradiated layer but pop-in events and pile-up need to be taken into account for correct interpretation of the mechanical properties of the irradiated material.

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Section: Materials and Sample Preparationmentioning

confidence: 99%

Section: Ion Implantationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Understanding the effects of ion irradiation using nanoindentation techniques

Hardie

Roberts

Bushby

2015

Journal of Nuclear Materials

Self Cite

101

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“…Besides, there are some challenges for the measurement of mechanical properties of ion implanted layers, including indentation size effect, pile-up effect, sink-in effect, and residual stresses. The pile-up and sink-in effect can be revised by scanning electron microscope (SEM) on the residual indents [27]. Many methods have been developed to estimate surface residual stress [28][29][30].…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Irradiation Hardening of P92 Steel under Ar Ion Irradiation

Liu

Shen

Zhu³

et al. 2018

Metals

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P92 steel was irradiated with Ar ion up to 10 dpa at 200, 400, and 700 • C. The effect of Ar ion irradiation on hardness was investigated with nanoindentation tests and microstructure analyses. It was observed that irradiation-induced hardening occurred in the steel after Ar ion irradiation at all three temperatures to 10 dpa. The steel exhibited significant hardening at 200 and 700 • C, and slight hardening at 400 • C under Ar ion irradiation. Difference in the magnitude of irradiation-induced hardening at different temperature in the steel is attributed to different changes in the microstructure of the steel that arose from the irradiation. Irradiation-induced hardening in the P92 steel irradiated at 200 • C is attributed to the occurrence of both dislocation loops and other fine irradiation defects during irradiation. Slight hardening in the steel irradiated at 400 • C mainly arises from the annihilation of defect clusters at this temperature. The occurrence of fine Ar bubbles with high number density during the Ar ion irradiation at 700 • C resulted in the significant hardening in the steel.

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“…Nanoindentation is a small scale testing technique, and has been widely used to characterize the properties of thin ion implanted regions, e.g. the hardness changes of single crystal Cu irradiated with protons, Si and C ions [9,10], F82H, Inconel 718 and 316LN irradiated with Fe and He ions [11,12], Fe-Cu/Mn and Fe-Cr alloys irradiated with Fe ions [13][14][15], HT-9 irradiated with protons and He ions [16], Eurofer 97 irradiated with He ions [17] have been extensively investigated by nanoindentation.…”

Section: Introductionmentioning

confidence: 99%