6 research outputs found

    Changes in Mechanical Properties, Structure and Phase Composition of Industrial Alloy 47CRNIMO affer Aging

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    Π Π°Π·Π²ΠΈΡ‚ΠΈΠ΅ соврСмСнной ядСрной ΠΏΡ€ΠΎΠΌΡ‹ΡˆΠ»Π΅Π½Π½ΠΎΡΡ‚ΠΈ ΠΏΡ€ΠΈΠ²ΠΎΠ΄ΠΈΡ‚ ΠΊ нСобходимости создания ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ², Ρ€Π°Π±ΠΎΡ‚Π°ΡŽΡ‰ΠΈΡ… ΠΏΡ€ΠΈ высоких Ρ‚Π΅ΠΌΠΏΠ΅Ρ€Π°Ρ‚ΡƒΡ€Π°Ρ…, Π±ΠΎΠ»ΡŒΡˆΠΈΡ… мСханичСских Π½Π°Π³Ρ€ΡƒΠ·ΠΊΠ°Ρ…, агрСссивных срСдах. Π‘ΠΏΠ»Π°Π² 47Π₯НМ Ρ€Π΅ΠΊΠΎΠΌΠ΅Π½Π΄ΠΎΠ²Π°Π½ для использования Π² ядСрных Ρ€Π΅Π°ΠΊΡ‚ΠΎΡ€Π°Ρ…, Ρ‚Π°ΠΊ ΠΊΠ°ΠΊ ΠΎΠ±Π»Π°Π΄Π°Π΅Ρ‚ высоким сопротивлСниСм пластичСским дСформациям ΠΈ рСлаксационной ΡΡ‚ΠΎΠΉΠΊΠΎΡΡ‚ΡŒΡŽ Π² условиях статичСского ΠΈ цикличСского Π½Π°Π³Ρ€ΡƒΠΆΠ΅Π½ΠΈΠΉ, ΠΌΠ°Π»Ρ‹ΠΌ ΡƒΠΏΡ€ΡƒΠ³ΠΈΠΌ гистСрСзисом, высокой усталостной ΠΏΡ€ΠΎΡ‡Π½ΠΎΡΡ‚ΡŒΡŽ ΠΈ высокой ΠΊΠΎΡ€Ρ€ΠΎΠ·ΠΈΠΎΠ½Π½ΠΎΠΉ ΡΡ‚ΠΎΠΉΠΊΠΎΡΡ‚ΡŒΡŽ, Ρ‚Π΅Ρ€ΠΌΠΎΡΡ‚ΠΎΠΉΠΊΠΎΡΡ‚ΡŒΡŽ. Π’ ΡΡ‚Π°Ρ‚ΡŒΠ΅ прСдставлСны Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ исслСдования ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ физико‑мСханичСских свойств, Ρ„Π°Π·ΠΎΠ²ΠΎΠ³ΠΎ состава ΠΈ структур ΠΏΡ€ΠΎΠΌΡ‹ΡˆΠ»Π΅Π½Π½ΠΎΠ³ΠΎ сплава 47Π₯НМ послС старСния ΠΌΠ΅Ρ‚ΠΎΠ΄Π°ΠΌΠΈ рСнтгСноструктурного Π°Π½Π°Π»ΠΈΠ·Π°, ΠΈΠ·ΠΌΠ΅Ρ€Π΅Π½ΠΈΠΉ микротвСрдости, Π° Ρ‚Π°ΠΊΠΆΠ΅ ΠΌΠ΅Ρ‚ΠΎΠ΄Π°ΠΌΠΈ Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½ΠΎΠΉ элСктронной микроскопии. УстановлСна Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡ‚ΡŒ микротвСрдости ΠΎΡ‚ ΠΈΠ½Ρ‚Π΅Ρ€Π²Π°Π»Π° Π²Ρ€Π΅ΠΌΠ΅Π½ΠΈ провСдСния старСния. Π’ Ρ€Π°Π±ΠΎΡ‚Π΅ ΠΏΡ€ΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡ€ΠΎΠ²Π°Π½Ρ‹ Ρ€Π΅Π½Ρ‚Π³Π΅Π½ΠΎΠ³Ρ€Π°ΠΌΠΌΡ‹ сплава 47Π₯НМ, Π³Π΄Π΅ ΠΎΠ±Π½Π°Ρ€ΡƒΠΆΠ΅Π½Ρ‹ Ρ„Π°Π·Ρ‹ со структурой Π€Ρ€Π°Π½ΠΊΠ°β€‘ΠšΠ°ΡΠΏΠ΅Ρ€Π°. ΠŸΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½Π° кластСрная модСль ΠΌΠ΅ΠΆΠ·Π΅Ρ€Π΅Π½Π½Ρ‹Ρ… Π³Ρ€Π°Π½ΠΈΡ†The development of the modern nuclear industry leads to the need to create materials that operate at high temperatures, high mechanical loads, and aggressive contact environments. Alloy 47Π₯НМ is recommended for use in nuclear reactors, as it has high resistance to plastic deformation and relaxation resistance under conditions of static and cyclic loading, low elastic hysteresis, high fatigue strength and high corrosion resistance. The article presents the results of a study of changes in the mechanical properties, phase composition and structures of the industrial alloy 47Π₯НМ after aging using the following methods: X‑ray diffraction analysis, microhardness measurements, tension in a tensile testing machine. The dependence of microhardness on the aging time interval has been established. The maximum high microhardness was recorded on the samples after aging. The dependences of the ultimate strength and relative elongation of the studied samples on the aging time were revealed. In this work, X‑ray diffraction patterns of the 47Π₯НМ alloy were analyzed and a cluster model of grain boundaries was propose

    Investigation of Structural-Phase States and Features of Plastic Deformation of the Austenitic Precipitation-Hardening Co-Ni-Nb Alloy

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    This article presents the results of investigation of the influence of holding temperature during the quenching process on the microstructure and superplasticity of the Co-Ni-Nb alloy. Temperature-strain rate intervals of the deformation of the superplasticity effects are stated. The optimal regimes of the preliminary treatment by quenching and rolling as well as the routine of the superplastic deformation of the Co-Ni-Nb alloy are defined. The interval of the temperatures of the precipitation, morphology, composition, type and parameters of the lattice of the secondary phase, which appears after the annealing + rolling (to 90%) Co-Ni-Nb alloy, are determined

    Investigation of Structural-Phase States and Features of Plastic Deformation of the Austenitic Precipitation-Hardening Co-Ni-Nb Alloy

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    This article presents the results of investigation of the influence of holding temperature during the quenching process on the microstructure and superplasticity of the Co-Ni-Nb alloy. Temperature-strain rate intervals of the deformation of the superplasticity effects are stated. The optimal regimes of the preliminary treatment by quenching and rolling as well as the routine of the superplastic deformation of the Co-Ni-Nb alloy are defined. The interval of the temperatures of the precipitation, morphology, composition, type and parameters of the lattice of the secondary phase, which appears after the annealing + rolling (to 90%) Co-Ni-Nb alloy, are determined

    The Study of the Flow Stress During Superplastic Deformation Co-Ni-Nb Alloy

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    Π’ ΡΡ‚Π°Ρ‚ΡŒΠ΅ описана ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΈΠΊΠ° для ΠΎΡ†Π΅Π½ΠΊΠΈ истинных напряТСний тСчСния ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹ΠΌ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ ΠΏΡ€ΠΈ свСрхпластичСской Π΄Π΅Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈ. ΠŸΡ€ΠΎΠ²Π΅Π΄Π΅Π½Ρ‹ исслСдования измСнСния истинных напряТСний ΠΏΡ€ΠΈ свСрхпластичСской Π΄Π΅Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈ Π² ΠΎΠΏΡ‚ΠΈΠΌΠ°Π»ΡŒΠ½ΠΎΠΌ Ρ€Π΅ΠΆΠΈΠΌΠ΅ диспСрсионно- Ρ‚Π²Π΅Ρ€Π΄Π΅ΡŽΡ‰Π΅Π³ΠΎ сплава Π½Π° ΠΊΠΎΠ±Π°Π»ΡŒΡ‚-никСль-Π½ΠΈΠΎΠ±ΠΈΠ΅Π²ΠΎΠΉ основС. ИсслСдована микроструктура сплава Π² зависимости ΠΎΡ‚ стСпСни свСрхпластичСской Π΄Π΅Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈThe article describes an experimental method for estimating the true flow stress at superplastic deformation. Studied changes of the true stress at superplastic deformation in optimally mode the precipitation-hardening alloy of cobalt-nickel-niobium. The microstructure of the alloy according to the extent of superplastic deformatio

    Structural-Phase Conditions and Flow Stress at Plastic Deformation of Steel 12Π₯18Н10Π’

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    Π’ ΡΡ‚Π°Ρ‚ΡŒΠ΅ прСдставлСны Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ структурно-Ρ„Π°Π·ΠΎΠ²Ρ‹Ρ… ΠΏΡ€Π΅Π²Ρ€Π°Ρ‰Π΅Π½ΠΈΠΉ ΠΈ ΠΈΡ… коррСляции с ΠΌΠΈΠΊΡ€ΠΎΡ‚Π²Π΅Ρ€Π΄ΠΎΡΡ‚ΡŒΡŽ Π² стали 12Π₯18Н10Π’ послС тСрмомСханичСской ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚ΠΊΠΈ ΠΈ высокотСмпСратурной пластичСской Π΄Π΅Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈ. Π‘Π΄Π΅Π»Π°Π½Ρ‹ ΠΎΡ†Π΅Π½ΠΊΠΈ истинных напряТСний ΠΏΡ€ΠΈ одноосном растяТСнииThe article presents the results of structural and phase transformations and their correlation with microhardness in steel 12X18H10T after thermomechanical treatment and high-temperature plastic deformation. Assessments of the true flow stress during high-temperature uniaxial tensio

    The Study of the Flow Stress During Superplastic Deformation Co-Ni-Nb Alloy

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    Π’ ΡΡ‚Π°Ρ‚ΡŒΠ΅ описана ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΈΠΊΠ° для ΠΎΡ†Π΅Π½ΠΊΠΈ истинных напряТСний тСчСния ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹ΠΌ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ ΠΏΡ€ΠΈ свСрхпластичСской Π΄Π΅Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈ. ΠŸΡ€ΠΎΠ²Π΅Π΄Π΅Π½Ρ‹ исслСдования измСнСния истинных напряТСний ΠΏΡ€ΠΈ свСрхпластичСской Π΄Π΅Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈ Π² ΠΎΠΏΡ‚ΠΈΠΌΠ°Π»ΡŒΠ½ΠΎΠΌ Ρ€Π΅ΠΆΠΈΠΌΠ΅ диспСрсионно- Ρ‚Π²Π΅Ρ€Π΄Π΅ΡŽΡ‰Π΅Π³ΠΎ сплава Π½Π° ΠΊΠΎΠ±Π°Π»ΡŒΡ‚-никСль-Π½ΠΈΠΎΠ±ΠΈΠ΅Π²ΠΎΠΉ основС. ИсслСдована микроструктура сплава Π² зависимости ΠΎΡ‚ стСпСни свСрхпластичСской Π΄Π΅Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈThe article describes an experimental method for estimating the true flow stress at superplastic deformation. Studied changes of the true stress at superplastic deformation in optimally mode the precipitation-hardening alloy of cobalt-nickel-niobium. The microstructure of the alloy according to the extent of superplastic deformatio
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