Effect of plastic deformation on anelastic mechanical losses in multicomponent substitutional austenitic alloys

Ivanchenko, Mykola; Yagodzinskyy, Yuriy; Hänninen, Hannu

doi:10.1016/j.msea.2008.09.093

Cited by 11 publications

(8 citation statements)

References 8 publications

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“…Indeed, taking into account a linear rise of the low-temperature internal friction background measured at 150 K and shown in Fig. 6, a, the dependence of the peak height on the deformation degree is typical for Hasiguti relaxation resulting from dislocation-vacancy interaction [20]. Fouquet et al [21] obtained similar results on polycrystalline copper deformed at room temperature.…”

Section: Hydrogen Effect On Interaction Between the Lattice Defectsmentioning

confidence: 53%

Hydrogen-Induced Effects in Annealed and Prestrained 316L-Type Stainless Steel Studied by Mechanical Spectroscopy

Shyvaniuk¹

2016

Metallofiz. Noveishie Tekhnol.

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Annealed and tensile prestrained 316L-type stainless steel is studied by internal friction (IF) method. Low-frequency forced-vibration measurements of IF are carried out in the temperature range of 130-500 K before and after gaseous-hydrogen charging at 543 K and under three different pressures: 0.5, 10, and 100 MPa. Two complex multicomponent IF peaks at about 250 and 365 K are detected after preliminary tensile deformation in hydrogenfree material. As revealed, the low-temperature peak is of relaxation type, and the high-temperature one is a resonant peak. The effect of hydrogen content and hydrogen distribution on IF peaks' features, e.g., background, amplitude and thermal stability, is examined. An increase in stability of vacancies caused by hydrogen is suggested that follows from IF measurements after ageing at 473 K. As experimentally shown, the temperature drop of hydrogenation to 358 K leads to a marked shift of the high-temperature peak toward higher temperatures. A hypothesis about the cause underlying this phenomenon is proposed.За допомогою механічної спектроскопії, а саме, міряння внутрішнього тертя, досліджено неіржавійну сталь типу 316L у відпаленому та дефор-мованому розтягом станах. Низькочастотні міряння внутрішнього тертя на вимушених коливаннях проводилися в температурному діапазоні від 130 до 500 К перед і після газового наводнювання при 543 К та трьох зна-ченнях тиску водню: 0,5, 10 та 100 МПа. Після деформації розтягом у ви-хідному матеріалі виявлено два мультикомпонентних піки при темпера-турах біля 250 та 365 К. Показано, що низькотемпературний пік має ре-лаксаційну природу, в той час як високотемпературний пік відноситься до резонансних. Також було перевірено вплив вмісту водню та його розпо-ділу на властивості піків внутрішнього тертя, а саме, на їх фон, амплітуду та термічну стабільність. Сформульовано припущення про те, що водень сприяє стабілізації вакансій, що випливає із експериментальних дослі-джень наводненої та зістареної при 473 К сталі. Експериментально пока-зано, що зниження температури наводнювання до 358 К призводить до С помощью механической спектроскопии, а именно, измерения внутрен-него трения, исследована нержавеющая сталь типа 316L в отожжённом и деформированном растяжением состояниях. Низкочастотные измерения внутреннего трения на вынужденных колебаниях проведены в темпера-турном диапазоне от 130 до 500 К до и после газового наводороживания при 543 К и трёх значениях давления водорода: 0,5, 10 и 100 МПа. После деформации растяжением в исходном состоянии обнаружены два муль-тикомпонентных пика при температурах около 250 и 365 К. Показано, что низкотемпературный пик имеет релаксационную природу, в то время как высокотемпературный пик относится к резонансным. Также прове-рено влияние содержания водорода и его распределения на свойства пи-ков внутреннего трения, а именно, на их фон, амплитуду и термическую стабильность. Сформулировано предположение о том, что водород способ-ствует стабилизации вакансий, что следует из экспериментальных иссле-дований наводороженной и сос...

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Section: Hydrogen Effect On Interaction Between the Lattice Defectsmentioning

confidence: 53%

Hydrogen-Induced Effects in Annealed and Prestrained 316L-Type Stainless Steel Studied by Mechanical Spectroscopy

Shyvaniuk¹

2016

Metallofiz. Noveishie Tekhnol.

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“…Additional relaxation due to re-orientation of i-i or i-s pairs formed during straining cannot be considered as the major mechanisms due to high Cr content of the studied steel (17 wt.%) and transitional nature of the enhanced peak. Also, it is hard to expect peak increase due to formation of extra i-v pairs after the deformation at 288 and 400°C, as low-temperature IF peaks attributed to point defectsdislocation interactions and annihilation of point defects [12] show opposite behaviour to Snoek-like peak (Fig. 2).…”

Section: Discussionmentioning

confidence: 99%

“…They are typically considered to be a consequence of an anelastic response of dislocations interacting with point defects in- duced by cold deformation. Origin of these peaks was analyzed in detail in [12]. The IF peak in the vicinity of 350°C represents Snoek-like relaxation process, which is known for steels as Finkelshtein-Rosin relaxation [13], and was confirmed by numerous authors in different fcc alloys and pure metals [14].…”

Section: Internal Friction Measurementsmentioning

confidence: 96%

“…Three well-defined maxima in the Q À1 value are apparent for the strained materials, forming peaks situated at about À50, 100 and 350°C, while only minor fluctuations were evident for the as-supplied material at the corresponding temperatures. The two lower temperature maxima in the Q À1 value (at À50 and 100°C) generally markedly increase in magnitude with the amount of prior cold deformation [11], and are even observed in interstitial-free austenitic stainless steels, such as AISI 316L [12]. They are typically considered to be a consequence of an anelastic response of dislocations interacting with point defects in- duced by cold deformation.…”

Section: Internal Friction Measurementsmentioning

confidence: 99%

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Microstructural manifestation of dynamic strain aging in AISI 316 stainless steel

Karlsen

Ivanchenko

Ehrnstén

et al. 2009

Journal of Nuclear Materials

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“…If the imposed strain rate falls into this range, plastic flow is heterogeneous, with plastic strain rate highly localized in narrow bands, either static or propagating in a continuous or discontinuous manner. Austenitic stainless steels are particularly suited to the study of DSA mechanisms because of the large temperature range over which serrated flow can occur [15,16]. Certain solute atom concentrations and at some specific strain rates over which serrated flow may be observed [17,18].…”

Section: Introductionmentioning

confidence: 99%

Formability of Austenitic Stainless Steel 316 Sheet in Dynamic Strain Aging Regime

Hussaini¹,

Singh²,

Gupta³

2014

Acta Metall Slovaca

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Dynamic strain aging region for austenitic stainless steel 316 was investigated from room temperature to 650°C at constant strain rates of 1x10 -2 , 1x10 -3 and 1x10 -4 sec -1 . Characteristics indicators of serrated plastic flow were observed in the temperature range of 400°C to 600°C at these strain rates. Strain rate sensitivity of the material is found to be negative in this region. Study of fracture surface of tensile test specimen by scanning electron microscope revealed that ductility in this region decreased. The limiting drawing ratio of sheet metal is the indicator of formability in deep drawing. LDR of the sheet metal was estimated by performing the deep drawing of different diameter blanks in finite element simulation software LS-DYNA in DSA temperature region. It was observed that in DSA region, formability of sheet metal decreased. These simulations are validated and compared with experimental results.

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Effect of plastic deformation on anelastic mechanical losses in multicomponent substitutional austenitic alloys

Cited by 11 publications

References 8 publications

Hydrogen-Induced Effects in Annealed and Prestrained 316L-Type Stainless Steel Studied by Mechanical Spectroscopy

Hydrogen-Induced Effects in Annealed and Prestrained 316L-Type Stainless Steel Studied by Mechanical Spectroscopy

Microstructural manifestation of dynamic strain aging in AISI 316 stainless steel

Formability of Austenitic Stainless Steel 316 Sheet in Dynamic Strain Aging Regime

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