Effect of Hot Deformation Parameters on Austenitic Ni – Co – Cr – Mo-Alloy Microstructure Evolution

Kodzhaspirov, G. E.; Terent’ev, M. I.; Filippov, S. A.

doi:10.1007/s11041-014-9739-4

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…The grain size (D) of the alloy and yield strength (σ y ) in line with the Hall-Petch relationship [20][21][22]:…”

Section: Effect Of Melt Purification On Mechanical Propertiesmentioning

confidence: 53%

Effect of Melt Purification on Microstructure and Mechanical Properties of 3003 Aluminum Alloy

Chen

Wang³

et al. 2018

MSF

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The 3003 aluminum alloy melt was treated with three types of melt purification, and the effect of melt purification on the microstructure and mechanical properties of the alloy was investigated. The results show that the impurity content of 3003 aluminum alloy with untreated (UT) reached 0.6801 %. After the process of conventional purification treatment (CPT) and efficient purification treatment (EPT), the impurity content of the alloy decreased significantly, and the fluidity of aluminum melt was improved. Finely dispersed inclusions particles can promote nucleation, refine the size of the cast crystal. Alloy strength and plasticity have increased using the process of CPT and EPT, in particular, EPT is the most obvious. It shows that the purity of aluminum melt plays a key role in the mechanical properties of the alloy.

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“…The grain size (D) of the alloy and yield strength (σ y ) in line with the Hall-Petch relationship [20][21][22]:…”

Section: Effect Of Melt Purification On Mechanical Propertiesmentioning

confidence: 53%

Effect of Melt Purification on Microstructure and Mechanical Properties of 3003 Aluminum Alloy

Chen

Wang³

et al. 2018

MSF

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“…The polygonal structure occurs in the local area, and the alloy mainly undergoes dynamic recovery to form a typical sub-grain structure. [13][14][15] This is due to the fact that there is a dynamic balance between the dislocation propagation caused by the strain hardening and the dislocation cancellation and recombination caused by the recovery softening, resulting in a relatively stable sub-grain structure. The sub-grain exhibits a slightly elongated feature, and its extension is perpendicular to the direction of the compression axis.…”

Section: Flow-stress Curvementioning

confidence: 99%

Effects of deformation temperature on the microstructure and mechanical properties of the AA3003 aluminium alloy

Chen¹,

Guo²,

Lin³

et al. 2018

Mater. Tehnol.

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The AA3003 aluminium alloy was deformed by isothermal compression in the deformation temperature range 300-500°C at a strain rate of 0.l s-1 with a Gleeble-1500 thermal simulator. The microstructure of the alloy was observed by OM and TEM, and the hardness was measured with a microhardness tester. The results show that the flow stress decreases with an increase of the deformation temperature. The dislocation density in the grain is large, and the polygonal structure occurs in the local area under low-temperature conditions. When the temperature reaches 400°C, the dislocation density decreases gradually, and the repetitive polygonal process occurs. The deformation mechanism is changed from dynamic recovery to dynamic recrystallization (DRX). The DRX volume fraction and grain size increase with an increase of the deformation temperature. The relationship between the micro-Vickers hardness and the DRX grain size of the alloy after hot deformation agrees with the Hall-Petch equation. At the strain rate of 0.1 s-1 , the optimum temperature of hot deformation for the alloy is about 400°C.

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“…3. Stress-strain curves for alloy 51%Ni-19%Cr-6%Mo with strain rate 0,01 s -1 (a), 0,1 s -1 (b), and 1 s -1 [11] .…”

Section: Thermec 2016mentioning

confidence: 99%

The Effect of Thermomechanical Processing Temperature-Strain-Time Parameters on the Mesostructure Formation

Kodzhaspirov

Rudskoi

2016

MSF

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The effects of Temperature-Strain-Time parameters at the Thermomechanical Processing (TMP) of austenitic, duplex and pearlitic structural steels on the mesostructure formation has been studied based on the laboratory, industrial experiments and TEM analysis. The fragmented dislocation substructure observed in steels with a different carbon, nitrogen, titanium, niobium content as well as recrystallization gave evidence that TMP effects the work-hardening and softening behaviour. The problem of mesostructure appearing in various steels and alloys due to various modes of TMP used hot and hot-warm deformation is discussed. The role of plastic strain in the formation of mesostructure and the relation between the changes in the crystal structure due to TMP and the mechanical properties of the steels are considered.

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Effect of Hot Deformation Parameters on Austenitic Ni – Co – Cr – Mo-Alloy Microstructure Evolution

Cited by 4 publications

References 3 publications

Effect of Melt Purification on Microstructure and Mechanical Properties of 3003 Aluminum Alloy

Effect of Melt Purification on Microstructure and Mechanical Properties of 3003 Aluminum Alloy

Effects of deformation temperature on the microstructure and mechanical properties of the AA3003 aluminium alloy

The Effect of Thermomechanical Processing Temperature-Strain-Time Parameters on the Mesostructure Formation

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