Precision measurements of critical resolved shear stress in CuMn alloys

Wille, Th.; Schwink, Ch.

doi:10.1016/0001-6160(86)90216-6

Cited by 34 publications

(10 citation statements)

References 31 publications

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“…This was explained by a more pronounced effect of the thermal activation of the dislocation mobility due to the higher amount of obstacles on the gliding planes, in comparison to alloys with a lower number of alloying elements. On a smaller scale, this effect can already be observed in binary alloys, e.g., Cu-Al, Cu-Ge, Cu-Mn [112][113][114]. In contrast, it seems that the stacking-fault energy does not change much with temperature, and therefore can be ruled out as the cause for the difference in the deformation mechanism.…”

Section: Influence Of Thermo-mechanical Treatment On Mechanical Propementioning

confidence: 96%

Single-phase high-entropy alloys – an overview

Kozak

Sologubenko

Steurer

2014

Zeitschrift Für Kristallographie - Crystalline Materials

136

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Abstract:The term "high-entropy alloys (HEAs)" first appeared about 10 years ago defining alloys composed of n = 5-13 principal elements with concentrations of approximately 100/n at.% each. Since then many equiatomic (or near equiatomic) single-and multi-phase multicomponent alloys were developed, which are reported for a combination of tunable properties: high hardness, strength and ductility, oxidation and wear resistance, magnetism, etc. In our paper, we focus on probably single-phase HEAs (solid solutions) out of all HEAs studied so far, discuss ways of their prediction, mechanical properties. In contrast to classical multielement/multiphase alloys, only single-phase multielement alloys (solid solutions) represent the basic concept underlying HEAs as mixing-entropy stabilized homogenous materials. The literature overview is complemented by own studies demonstrating that the alloys CrFeCoNi, CrFeCoNiAl 0.3 and PdFeCoNi homogenized at 1300 and 1100°C, respectively, for 1 week are not singlephase HEAs, but a coherent mixture of two solid solutions.

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Section: Influence Of Thermo-mechanical Treatment On Mechanical Propementioning

confidence: 96%

Single-phase high-entropy alloys – an overview

Kozak

Sologubenko

Steurer

2014

Zeitschrift Für Kristallographie - Crystalline Materials

136

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“…The low temperature yield stress ( SSH ) of at least Co 3 (Al,W) consists of an athermal ( ath ) and a thermal ( th ) component (Figure 15), such that [28,29]:…”

Section: Rapid Decrease In Yield Stress At Low Temperaturesmentioning

confidence: 99%

Plastic deformation of polycrystals of Co₃(Al,W) with the L1₂structure

Okamoto

Oohashi

Adachi

et al. 2011

Philosophical Magazine

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The plastic behaviour of Co 3 (Al,W) polycrystals with the L1 2 structure has been investigated in compression from 77 to 1273 K. The yield stress exhibits a rapid decrease at low temperatures (up to room temperature) followed by a plateau (up to 950 K), then it increases anomalously with temperature in a narrow temperature range between 950 and 1100 K, followed again by a rapid decrease at high temperatures. Slip is observed to occur exclusively on {111} planes at all temperatures investigated. The rapid decrease in yield stress observed at low temperatures is ascribed to a thermal component of solid-solution hardening that occurs during the motion of APB-coupled dislocations whose core adopts a planar, glissile structure. The anomalous increase in yield stress is consistent with the thermally activated cross-slip of APB-coupled dislocations from (111) to (010), as for many other L1 2 compounds. Similarities and differences in the deformation behaviour and operating mechanisms among Co 3 (Al,W) and other L1 2 compounds, such as Ni 3 Al and Co 3 Ti, are discussed.

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“…It is well known that in BCC metals, the Peierls barrier can act as a strong short-range obstacle for moving dislocations due to the non-planar core structure of screw dislocation, causing the thermal activation of dislocation glide [21][22][23]. In contrast, the Peierls barrier is negligibly small in FCC metals, leading to very weak temperature dependence of yield strength [24][25][26][27]. As shown in Figs.…”

Section: Introductionmentioning

confidence: 99%

Single crystal plastic behavior of a single-phase, face-center-cubic-structured, equiatomic FeNiCrCo alloy

Gao

Bei

2015

Scripta Materialia

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a b s t r a c tTo understand the fundamental deformation mechanisms of compositionally complex alloys, single crystals of a multi-component equiatomic FeNiCoCr alloy with face-center-cubic (FCC) structure were grown for mechanical studies. Similar to typical FCC pure metals, slip trace analyses indicate that dislocation slips take place on (1 1 1) planes along ½1 1 0 directions. The critical resolved shear stress (CRSS) obeys the Schmid law at both 77 and 293 K, and tension-compression asymmetry is not observed. Although this material slips in a normal FCC manner both at 293 and 77 K, the strong temperature dependence of the CRSS is abnormal in comparison to the typical FCC metals.

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Precision measurements of critical resolved shear stress in CuMn alloys

Cited by 34 publications

References 31 publications

Single-phase high-entropy alloys – an overview

Single-phase high-entropy alloys – an overview

Plastic deformation of polycrystals of Co₃(Al,W) with the L1₂structure

Single crystal plastic behavior of a single-phase, face-center-cubic-structured, equiatomic FeNiCrCo alloy

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Precision measurements of critical resolved shear stress in CuMn alloys

Cited by 34 publications

References 31 publications

Single-phase high-entropy alloys – an overview

Single-phase high-entropy alloys – an overview

Plastic deformation of polycrystals of Co3(Al,W) with the L12structure

Single crystal plastic behavior of a single-phase, face-center-cubic-structured, equiatomic FeNiCrCo alloy

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Plastic deformation of polycrystals of Co₃(Al,W) with the L1₂structure