The enhancement of the mechanical properties and the shape memory effect for the Cu-13.0Al-4.0Ni alloy by boron addition

Zhang, Xin; Zhang, Ming; Cui, Tianyu; Li, Jinman; Liu, Qingsuo; Wang, Haibo

doi:10.1016/j.jallcom.2018.10.176

Cited by 33 publications

(9 citation statements)

References 18 publications

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“…It can be seen that although the strength improvement of the Cu-Al-Ni alloys with the addition of Sm element is smaller than that with the addition of B, Ce, and V elements, it is still better than the addition of Mn, Ge, Te, Gd and Nd elements. In the improvement of the alloy’s plasticity, the effect of the doped Sm element is similar to that of the doped B element; while it is not as good as the doped Mn, V, Gd, and Nd elements, it is still better than the doped Ge, Ce and Te elements [ 26 , 28 , 30 , 32 , 33 , 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…When x = 0.5, more Sm-rich phases are formed, leading to the SME being suppressed, and the less reversible strain is obtained. Compared with most non-rare earth elements, the rare earth element Sm can better improve the SME of the Cu-Al-Ni alloys, but its effect is not as good as that of the B element and the rare earth elements Gd and Nd [ 26 , 33 , 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…Among them, the alloying method has the characteristic of simple equipment, and so the addition of the fourth element is considered to be an effective method to improve the mechanical properties of Cu-Al-Ni SMAs, with simple operation and convenient production [ 22 , 23 , 24 , 25 ]. Recently, some predecessors have conducted studies on adding Ti, B, Be, Mn, Ge, Co, and V elements to Cu-Al-Ni alloys [ 16 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. For example, the addition of Co can effectively increase the tensile fracture strength of the Cu-11.9Al-4.0Ni alloy from 270 to 650 MPa, and the tensile fracture strain can increase from 1.65 to 7%.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Sm Doping on the Microstructure, Mechanical Properties and Shape Memory Effect of Cu-13.0Al-4.0Ni Alloy

et al. 2021

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The effects of rare earth element Sm on the microstructure, mechanical properties, and shape memory effect of the high temperature shape memory alloy, Cu-13.0Al-4.0Ni-xSm (x = 0, 0.2 and 0.5) (wt.%), are studied in this work. The results show that the Sm addition reduces the grain size of the Cu-13.0Al-4.0Ni alloy from millimeters to hundreds of microns. The microstructure of the Cu-13.0Al-4.0Ni-xSm alloys are composed of 18R and a face-centered cubic Sm-rich phase at room temperature. In addition, because the addition of the Sm element enhances the fine-grain strengthening effect, the mechanical properties and the shape memory effect of the Cu-13.0Al-4.0Ni alloy were greatly improved. When x = 0.5, the compressive fracture stress and the compressive fracture strain increased from 580 MPa, 10.5% to 1021 MPa, 14.8%, respectively. When the pre-strain is 10%, a reversible strain of 6.3% can be obtained for the Cu-13.0Al-4.0Ni-0.2Sm alloy.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Sm Doping on the Microstructure, Mechanical Properties and Shape Memory Effect of Cu-13.0Al-4.0Ni Alloy

et al. 2021

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“…In both cases (ac and D&H samples) increasing of boron content has obviously led to finer grains. Zhang et al [33] believe that ' this result is due to the rapid diffusion of boron elements into the matrix microstructure and the aggregation at the grain boundaries to prevent the grain growth'. Furthermore, grain refinement is also involved in inhabititing effect of the grain growth of boron in a solid solution.…”

Section: Discussionmentioning

confidence: 99%

A novel medium entropy alloy based on iron-manganese-aluminum-nickel: influence of boron addition on phase formation, microstructure, and mechanical properties

Mohsen

2019

Mater. Res. Express

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A novel Medium Entropy Alloy (MEA) based on Fe-Mn-Al-Ni has been designed adopting High Entropy Alloys' (HEAs) phase formation rules, and the effects of minor boron addition on phase content and mechanical properties have been separately investigated. Boron-free Fe (52.71-x) Mn 31.11 Al 5.09 Ni 11.08 B x (x=0, 0.05, 0.2, 0.5, 0.7 wt%) MEA showed a single face-centered cubic (FCC) structure. XRD results indicated that with 0.05 and 0.2 wt% boron addition the system maintains its single-phase structure. Further boron addition led to the formation of metal boride intermetallics by the volume fractions of 4.6 and 6.1% of Fe 2 B intermetallic phase in as-cast and 2.7 and 5.4% in Deformed and Heat-treated (D&H) samples according to Rietveld analysis for 0.5 and 0.7 wt% boron doped alloys, respectively. Boron addition had a positive effect on grain size reduction of the system where just by 0.05 wt% boron addition the grain size has been almost halved compared to boron free as-cast sample. Moreover, it was observed that as the boron level increases, the hardness value increases. With in the all samples subjected to thermomechanical process, 0.7wt % boron doped alloy showed the best yield strength (increasing by ∼50%, from 151 MPa to 222.5 MPa) and ultimate tensile strength (increasing by ∼15%, from 476 MPa to 543 MPa) compared to undoped MEA at comparable ductility (ε>60%).

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“…The shape memory effect and the microstructure of (Cu-13Al-4 Ni) high temperature shape memory alloys with contents of boron (0.25 wt%, 0.5 wt%, 1.0 wt%, and 2.0 wt%) were studied by Xin Zhang et al and there study show that the addition of boron enhanced the mechanical properties of the shape memory alloy, but also greatly improved the shape memory effect of the alloy. The martensite fracture changed from intergranular to transgranular fracture [9]. In addition and it also found that the highest shape memory effect was by adding 0.25 wt% boron .…”

Section: Introductionmentioning

confidence: 86%

Influences of Mg Addition on the Mechanical Properties of Cu-Al-Ni Shape Memory Alloys

Razooqi¹,

Abdulkareem²

2020

Tikrit j. eng. sci.

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Shape Memory Alloys (SMAs) are a unique class of material that possesses unconventional properties such as the shape's memory effect, the high flexibility associated with damping capabilities, high wear resistance and fatigue. Given its use in a variety of technological applications, its studies have attracted increased interest in the community of scientists and researchers during the past decades. The shape memory alloy (Cu 83%-Al 13%-Ni 4%) and the other alloy with adding the alloying elements (Mg) with content of (0.25, 0.5, 0.75, 1.0, 1.25) % as a volumetric ratio which was taken from the copper percentage were prepared by powder metallurgy, The powders were mixed using (V-type) powders mixer with mixing speed and time (20 rpm), (16 min) respectively then the samples were pressed by a two-way press (floating die) and pressing pressure (500 MPa) then the green samples where sintered by using vacuum furnace with using Argon gas medium at a temperature (900°C) for one hour and left in the oven to cool down to room temperature. The results showed that both bulk density and apparent density compared to the base alloy increase by increasing the volumetric fraction of Mg by the ratios (5.49)% compared to the bulk density of the base alloy and by the ratios (1.51)% compared to the apparent density of the base alloy. accompanied by a decrease in the real and apparent porosity and water absorption, The results of the mechanical tests showed an increase in the hardness and diametrical compressive strength with the increase of volumetric fraction of (Mg) compared to the base alloy accompanied by a decrease in the rate of wear, The (XRD) test observes the composing phases (α(Cu4Al), β(Cu3Al), γ(Cu9Al44)) in addition to determining the transformation temperature from the Martensite to the Austenite by examining the (DSC) it was found that the Austenite initiation and finish (As), (Af) increased by adding the alloying elements (Mg).

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The enhancement of the mechanical properties and the shape memory effect for the Cu-13.0Al-4.0Ni alloy by boron addition

Cited by 33 publications

References 18 publications

Effect of Sm Doping on the Microstructure, Mechanical Properties and Shape Memory Effect of Cu-13.0Al-4.0Ni Alloy

Effect of Sm Doping on the Microstructure, Mechanical Properties and Shape Memory Effect of Cu-13.0Al-4.0Ni Alloy

A novel medium entropy alloy based on iron-manganese-aluminum-nickel: influence of boron addition on phase formation, microstructure, and mechanical properties

Influences of Mg Addition on the Mechanical Properties of Cu-Al-Ni Shape Memory Alloys

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