Nanoindentation creep study on an ion beam irradiated oxide dispersion strengthened alloy

Huang, Zijing; Harris, Adrian; Maloy, S.A.; Hosemann, Peter

doi:10.1016/j.jnucmat.2014.03.036

Cited by 31 publications

(25 citation statements)

References 21 publications

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“…It seems like up to 400°C the sample experiences little creep. Similar curves were shown by Huang et al in an ODS material PM2000, where little strain was found up to 120 s dwell time at temperatures below 500°C [19]. The final strain at the end of the dwell time has been plotted in Fig.…”

Section: High Temperature Nanoindentation Creepsupporting

confidence: 80%

“…At temperatures above 525°C, a noticeable decrease in high temperature mechanical properties is observed. It is noted that this material does not decrease its YS or UTS up to 525°C being more stable than other martensitic steels [30,31], or even ODS materials [19], which do experience continuous softening in that temperature range. It appears that the matrix strength follows from a careful balance between matrix softening and precipitate strengthening, because in this material no softening and even a slight strengthening is observed up to 450°C.…”

Section: Mechanical Property Evolution At Elevated Temperaturesmentioning

confidence: 85%

“…Nanoindentation at high temperature (HT) has been used for the last ten years and it has become a powerful technique to measure the mechanical properties at high temperatures such as hardness (H) and reduced modulus on a variety of different materials up to 700 and 750°C [14,15], but also other mechanical properties such as strain rate sensitivity (SRS or m-value) and activation volume (V*) [16][17][18][19]. In recent studies, the latter properties have been used to study the governing mechanism of deformation by different nanoindentation methods, such as strain rate jump, constant strain rate or constant load [16][17][18]20].…”

Section: Introductionmentioning

confidence: 99%

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A high temperature mechanical study on PH 13-8 Mo maraging steel

Huang

Abad

Ramsey

et al. 2016

Materials Science and Engineering: A

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a b s t r a c tHigh temperature mechanical measurements were conducted to study the effect of the dynamic precipitation process of PH 13-8 Mo maraging steel. Yield stress, ultimate tensile strength, total elongation, hardness, strain rate sensitivity and activation volume were evaluated as a function of the temperature. The dynamic changes in the mechanical properties at different temperatures were evaluated and a balance between precipitation hardening and annealed softening is discussed. A comparison between hardness and yield stress and ultimate tensile strength over a temperature range from 300 to 600°C is made. The behavior of the strain rate sensitivity was correlated with the intermetallic precipitates formed during the experiments.

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Section: High Temperature Nanoindentation Creepsupporting

confidence: 80%

Section: Mechanical Property Evolution At Elevated Temperaturesmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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A high temperature mechanical study on PH 13-8 Mo maraging steel

Huang

Abad

Ramsey

et al. 2016

Materials Science and Engineering: A

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“…Typically no significant difference is found between the hardness calculated from the beginning and end of the dwell period. However, at high temperatures where creep underneath the indenter is a concern it is appropriate to report both hardness numbers at the end and at the beginning of the dwell period [15].…”

Section: Hardness and Creepmentioning

confidence: 99%

“…Nanoindentation at high temperature is a well-suited method to obtain mechanical properties with high lateral and depth resolution [15,16]. The rate dependent deformation mechanisms can be locally obtained by strain rate jump-tests, relaxation tests, or creep experiments [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A high temperature nanoindentation study of Al–Cu wrought alloy

Koch

Abad

Renhart

et al. 2015

Materials Science and Engineering: A

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a b s t r a c tAluminum-copper alloys are widely used because of their low density and good mechanical strength accomplished with precipitation hardening. The alloy Al-Cu-Mg-Pb (AA2030) has been investigated before and after aging, at room temperature and at high temperatures. The mechanical properties at room temperature have been studied by Brinell hardness tests. T4 and T6 stages of the alloy have been investigated by differential scanning calorimetry up to 450°C, showing the precipitation of different clusters. High temperature nanoindentation has been used to characterize the mechanical properties up to 460°C in order to obtain a better understanding of the local dominating deformation mechanism in the material. A continuous decrease in the hardness and Young's modulus was found with the increasing temperature. The strain rate sensitivity of the alloy increased with the temperature from 0.022 at RT, up to 0.16 at 460°C. The activation volume was constant (around 31-41 b 3 ) up to 240°C, beyond this point a large increase was observed up to 178 b 3 . The results were comparable with similar materials, and indicate thermally activated processes.

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Mechanical Characterization of PM2000 Oxide‐Dispersion‐Strengthened Alloy by High Temperature Nanoindentation

Hangen

Chen²,

Richter

2015

Adv Eng Mater

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Nanoindentation measurements with a commercial Hysitron xSol 800 up to temperatures of 700°C have been applied to study mechanical properties of PM2000 ODS steel. Beside the temperature dependence of hardness H and indentation modulus E, a careful analysis of time-dependent features such as creep and stress exponent was performed. The H/E is dominated by a transition from small hardness variations at low temperatures to a strong hardness decrease starting at about 400°C. The two different deformation regimes have been attributed to modifications in dislocation pinning at temperatures up to 400°C and thermal activation over obstacles, when fine oxide nanoparticles of diameter 5-20 nm are present.

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Nanoindentation creep study on an ion beam irradiated oxide dispersion strengthened alloy

Cited by 31 publications

References 21 publications

A high temperature mechanical study on PH 13-8 Mo maraging steel

A high temperature mechanical study on PH 13-8 Mo maraging steel

A high temperature nanoindentation study of Al–Cu wrought alloy

Mechanical Characterization of PM2000 Oxide‐Dispersion‐Strengthened Alloy by High Temperature Nanoindentation

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