Strength–ductility combination of nanostructured Cu–Zn alloy with nanotwin bundles

Xiao, Gang; Tao, Nengguo; Lu, K.

doi:10.1016/j.scriptamat.2011.03.005

Cited by 40 publications

(20 citation statements)

References 15 publications

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“…Experimental works concentrate on other Cu alloys, i.e. Cu-Zn [34], Cu-Be [35], Cu-Ni [36], Cu-Mg [37], but the GSFE calculations have not been carried out yet for the alloys. Thus, in the present study, density functional theory calculations have been used to analyse the effect of alloying elements on GSFE of copper alloys.…”

Section: Introductionmentioning

confidence: 99%

Generalised stacking fault energies of copper alloys - density functional theory calculations

Muzyk

Kurzydłowski

2019

J min metall B Metall

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Generalised stacking fault energies of copper alloys have been calculated using density functional theory. Stacking fault energy of copper alloys is correlated with the d-electrons number of transition metal alloying element. The tendency to twiningis also modified by the presence of alloying element in the deformation plane. The results suggest that Cu-transition metal alloys with such elements as Cr, Mo, W, Mn, Re are expected to exhibit great work hardening rate due to the tendency to emission of the partial dislocations.

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Section: Introductionmentioning

confidence: 99%

Generalised stacking fault energies of copper alloys - density functional theory calculations

Muzyk

Kurzydłowski

2019

J min metall B Metall

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“…The annealed structure as a typical heterogeneous structure, containing nano-grains with nanotwins and static recrystallized grains, showed excellent performance in work hardening ability. The similar heterogeneous structures also work effectively in Cu-Zn and Cu-Al alloys, as shown in Figure 12c,d [80,91]. High manganese TWIP steels are perfect candidates in crash safety of automobile due to their excellent work hardening capability, but the TWIP steels with CG structure usually have low yielding strength [92].…”

Section: Strength and Ductilitymentioning

confidence: 91%

“…Another approach to introduce nanotwins in metals and alloys was severe plastic deformation (SPD) technique, which can generate grain refinement and deformation twinning. For materials with low SFE, such as Cu-Zn [80,81], Cu-Al [82,83], FeCoCrNiMn [84,85], CoCrNi [17,86,87], and other high/medium entropy alloys (H/MEAs), twinning is easier to occur than slipping, especially at the low temperature [88] and high strain rate [89]. Nanostructured Cu sample by means of dynamic plastic deformation (DPD) at liquid nitrogen temperature and subsequent short-time annealing showed surprisingly good strength-ductility combination [90].…”

Section: Strength and Ductilitymentioning

confidence: 99%

“…The hierarchical NT structures in FCC metals have been proposed to be a novel structure to bring out higher strength/ductility than NT counterparts due to their unique deformation phenomena [97]. dislocations can be generated at TBs for accommodating plastic deformation, which releases the local stress concentration and promotes further plastic deformation [66,[78][79][80]. Another approach to introduce nanotwins in metals and alloys was severe plastic deformation (SPD) technique, which can generate grain refinement and deformation twinning.…”

Section: Strength and Ductilitymentioning

confidence: 99%

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A Review on Heterogeneous Nanostructures: A Strategy for Superior Mechanical Properties in Metals

Yang

Yuan

et al. 2019

Metals

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Generally, strength and ductility are mutually exclusive in homogeneous metals. Nanostructured metals can have much higher strength when compared to their coarse-grained counterparts, while simple microstructure refinement to nanoscale generally results in poor strain hardening and limited ductility. In recent years, heterogeneous nanostructures in metals have been proven to be a new strategy to achieve unprecedented mechanical properties that are not accessible to their homogeneous counterparts. Here, we review recent advances in overcoming this strength–ductility trade-off by the designs of several heterogeneous nanostructures in metals: heterogeneous grain/lamellar/phase structures, gradient structure, nanotwinned structure and structure with nanoprecipitates. These structural heterogeneities can induce stress/strain partitioning between domains with dramatically different strengths, strain gradients and geometrically necessary dislocations near domain interfaces, and back-stress strengthening/hardening for high strength and large ductility. This review also provides the guideline for optimizing the mechanical properties in heterogeneous nanostructures by highlighting future challenges and opportunities.

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“…Nanostructured copper could combine high strength and good ductility by inducing static recrystallization during annealing process (Li et al, 2008b;Zhang et al, 2008). Dynamic plastic deformation and subsequent thermal annealing were employed to produce good-ductility and high-strength Cu-Zn alloy by mixing nanotwin bundles with microsized recrystallized grains (Xiao et al, 2011). Asymmetric rolling and partial recrystallization were conducted to fabricate heterogeneous lamella structural titanium with high-strength and coarse-grain-ductility (Wu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Hierarchical-microstructure based modeling for plastic deformation of partial recrystallized copper

Liu

Cai

et al. 2019

Mechanics of Materials

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Hierarchical microstructure in partial recrystallized materials can simultaneously improve the strength and ductility of metallic materials. Modeling the mechanical behavior of partial recrystallized materials helps to process materials with superior combination of ductility and strength. Here, using experimental characterization, cellular automation (CA) and finite element method, hierarchical-microstructure based modeling was proposed to simulate the tensile deformation of partial recrystallized copper. Firstly, partial recrystallized coppers with different volume fractions of recrystallization were produced by means of extrusion machining and subsequent heat treatment (HT). Uniaxial tensile tests and microstructural observations show that the hierarchical-microstructure of recrystallized grains (RGs) surrounded by elongated subgrains has a significant effect on the mechanical properties. Then, based on the experimental results, a hierarchical-microstructure based plasticity model was developed to describe the yield surface of partial recrystallized materials. CA was further employed to simulate the hierarchical microstructure. By embedding the plasticity model and simulated hierarchical-microstructure in finite element method, a finite element model (FEM) for mechanical behavior of partial recrystallized copper was proposed, where the elongated subgrain with forest dislocation and low angle grain boundary, the RG with few dislocations and twin boundary, and volume fraction of recrystallization were taken into consideration. Finally, the experimental data and the comparison with the conventional plasticity model validate the rationality of the proposed model.

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Strength–ductility combination of nanostructured Cu–Zn alloy with nanotwin bundles

Cited by 40 publications

References 15 publications

Generalised stacking fault energies of copper alloys - density functional theory calculations

Generalised stacking fault energies of copper alloys - density functional theory calculations

A Review on Heterogeneous Nanostructures: A Strategy for Superior Mechanical Properties in Metals

Hierarchical-microstructure based modeling for plastic deformation of partial recrystallized copper

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