Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation

Kappacher, Johann; Leitner, Alexander; Kiener, Daniel; Clemens, Helmut; Maier–Kiener, Verena

doi:10.1016/j.matdes.2020.108499

Cited by 42 publications

(9 citation statements)

References 44 publications

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“…Different from the smallest grain size of W-10Re alloy in Ref. [ 37 ], W-3Re alloy had a smallest grain size in our work, which might be due to the different fabrication. Similar to the existence of Mo-rich particles in W-Mo alloys [ 39 ], Ravi Kiran et al also observed the formation of Re-rich particles in their prepared W-Re alloys [ 40 ].…”

Section: Discussioncontrasting

confidence: 90%

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The Effect of Rhenium Content on Microstructural Changes and Irradiated Hardening in W-Re Alloy under High-Dose Ion Irradiation

Luo

Liu

et al. 2023

Nanomaterials

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An amount of 100 dpa Si2+ irradiation was used to study the effect of transmutation rhenium content on irradiated microscopic defects and hardening in W-xRe (x = 0, 1, 3, 5 and 10 wt.%) alloys at 550 °C. The increase in Re content could significantly refine the grain in the W-xRe alloys, and no obvious surface topography change could be found after high-dose irradiation via the scanning electron microscope (SEM). The micro defects induced by high-dose irradiation in W and W-3Re alloys were observed using a transmission electron microscope (TEM). Dislocation loops with a size larger than 10 nm could be found in both W and W-3Re alloy, but the distribution of them was different. The distribution of the dislocation loops was more uniform in pure W, while they seemed to be clustered around some locations in W-3Re alloy. Voids (~2.4 nm) were observed in W-3Re alloy, while no void was investigated in W. High-dose irradiation induced obvious hardening with the hardening rate between 75% and 155% in all W-xRe alloys, but W-3Re alloy had the lowest hardening rate (75%). The main reasons might be related to the smallest grain size in W-3Re alloy, which suppressed the formation of defect clusters and induced smaller hardening than that in other samples.

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Section: Discussioncontrasting

confidence: 90%

“…The addition of the Re element could significantly refine the grain, which was consistent in many studies [ 37 , 38 ]. Different from the smallest grain size of W-10Re alloy in Ref.…”

Section: Discussionsupporting

confidence: 87%

The Effect of Rhenium Content on Microstructural Changes and Irradiated Hardening in W-Re Alloy under High-Dose Ion Irradiation

Luo

Liu

et al. 2023

Nanomaterials

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“…However, the constants related to strain rate sensitivity (n 1 , n 2 , α, β) have a maximum in the range of the Mn concentration of 24–28%. The same position of the maximum was obtained in the dependence of the activation volume (

[ 59 ] on the Mn content at different temperatures ( Figure 9 b). The nature of this phenomenon requires detailed study.…”

Section: Discussionsupporting

confidence: 76%

Prediction of True Stress at Hot Deformation of High Manganese Steel by Artificial Neural Network Modeling

Churyumov

Kazakova

2023

Materials

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The development of new lightweight materials is required for the automotive industry to reduce the impact of carbon dioxide emissions on the environment. The lightweight, high-manganese steels are the prospective alloys for this purpose. Hot deformation is one of the stages of the production of steel. Hot deformation behavior is mainly determined by chemical composition and thermomechanical parameters. In the paper, an artificial neural network (ANN) model with high accuracy was constructed to describe the high Mn steel deformation behavior in dependence on the concentration of the alloying elements (C, Mn, Si, and Al), the deformation temperature, the strain rate, and the strain. The approval compression tests of the Fe–28Mn–8Al–1C were made at temperatures of 900–1150 °C and strain rates of 0.1–10 s−1 with an application of the Gleeble 3800 thermomechanical simulator. The ANN-based model showed high accuracy, and the low average relative error of calculation for both training (5.4%) and verification (7.5%) datasets supports the high accuracy of the built model. The hot deformation effective activation energy values for predicted (401 ± 5 kJ/mol) and experimental data (385 ± 22 kJ/mol) are in satisfactory accordance, which allows applying the model for the hot deformation analysis of the high-Mn steels with different concentrations of the main alloying elements.

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“…Термоактивационный анализ для анализа данных нано-/микромеханических испытаний начал систематически применяться с конца прошлого века с целью выявления механизмов пластического течения при импульсном NI [38][39][40]58,59,294,295], а затем и для определения природы первых скачков деформации при квазистатическом NI [82,296,297]. По результатам экспериментов с нагружением скачкообразным импульсом силы (длительность импульса на фронте ∼ 5 ms, скорость относительной деформации на начальной стадии погружения индентораε ∼ 10 3 s −1 ) была оценена величина V a , характеризующая тип носителя и атомный механизм пластического течения в монокристаллах NaCl, LiF, MgO, Al [4].…”

Section: размерные эффекты природа деформации и разрушения в наношкалеunclassified

Наноиндентирование И Механические Свойства Материалов В Субмикро- И Наношкале. Недавние Результаты И Достижения (О Б З О Р)

Головин¹

2021

Физика Твердого Тела

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The review discusses the details of various materials mechanical behavior in submicro- and nanoscale. Significant advances in this scope result from the development of wide family of load based precise nanotesting techniques called nanoindentation. But nowadays, nanomechanical properties are studied not only by nanoindentation techniques in narrow sense, i.e. local loading of macro, micro and nanoscale objects. Nanomechanical load testing is discussed here within a wider scope employing precise deformation measurement with nanometer scale resolution caused by various types of low load application to the object under study including uniaxial compression or extension, shearing, bending or twisting, optionally accompanied by in situ monitoring sample microstructure using scanning and transmission electron microscopy and Laue microdiffraction technique. The main courses of experimental techniques development in recent ten years along with the results obtained using them in single, poly and nano crystalline materials, composites, films and coatings, amorphous solids and such biomaterials as tissues, living cells and macromolecules are described. Special attention is paid to deformation size effects and atomic mechanisms in nanoscale. This review is a natural continuation and development of the review published at Fiz.Tverd.Tela vol.50, issue 12, 2008 of the same author that discusses details of nanomechanical properties of solids. Current review includes wider range of nanomechanical testing concepts and recent achievements in the scope. The work was supported by RFBR grant for project #19-12-50235.

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Thermally activated deformation mechanisms and solid solution softening in W-Re alloys investigated via high temperature nanoindentation

Cited by 42 publications

References 44 publications

The Effect of Rhenium Content on Microstructural Changes and Irradiated Hardening in W-Re Alloy under High-Dose Ion Irradiation

The Effect of Rhenium Content on Microstructural Changes and Irradiated Hardening in W-Re Alloy under High-Dose Ion Irradiation

Prediction of True Stress at Hot Deformation of High Manganese Steel by Artificial Neural Network Modeling

Наноиндентирование И Механические Свойства Материалов В Субмикро- И Наношкале. Недавние Результаты И Достижения (О Б З О Р)

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