A hierarchical and multiphase nanolaminated alloy with an excellent combination of tensile properties

Shi, Yindong; Li, Ming; Guo, Defeng; Zhang, Guosheng; Qian, Zhendong; Li, Xiaohong

doi:10.1016/j.msea.2014.07.081

Cited by 14 publications

(3 citation statements)

References 31 publications

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“…1c), numerous needle-like a 00 lamellas (indicated by yellow arrows), together with some equiaxed a grains, were presented in the residual b phase between a lamellas, demonstrating a heterogeneous lamellar structure [9]. The phase structures of these lamellas and grains were determined by selected area electron diffraction (SAED) analysis [12]. The above TEM observations revealed that the annealing, first-and second-step aging resulted in the formation of equiaxial grained, dual-phase lamella and heterogeneous lamellar structures in the cold deformed TiZrAlV alloy, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…By using the combination of cold deformation, e.g., asymmetrical rolling and cryorolling, and subsequent thermal treatments, heterogeneous lamellar structures and multimodal structures have been introduced into Ti, Cu, and Zr [9][10][11]. By using room temperature rolling and subsequent annealing, and aging, hierarchical structures have been formed in Tibased alloy [12]. The formation of these heterogeneous structures can be attributed to high cold deformation energy storage permitting high nucleation rates of recrystallization and phase transformation during the thermal treatment, which then produces various microstructures in deformed materials [13].…”

Section: Introductionmentioning

confidence: 99%

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Tailoring Microstructure and Tribological Properties of Cold Deformed TiZrAlV Alloy by Thermal Treatment

Zhang

Guo

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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Microstructure evolution and tribological properties of a new TiZrAlV alloy have been investigated in the present study. Various microstructures, i.e., equiaxed grain structure, dual-phase lamella structure, and heterogeneous lamellar structure, have been successfully prepared, and the effect of the microstructure on tribological properties was explored by means of cold severe plastic deformation combined with subsequent recrystallization annealing and aging treatments. The special heterogeneous lamellar-structured alloy exhibits a high ultimate tensile strength (*1545 MPa), reasonable ductility (*7.9%), and excellent wear resistance as compared with the equiaxed grain-structured and dualphase lamella-structured alloy. The present study demonstrates an alternative route for enhancing the tribological properties of alloys with heterogeneous lamellar structure.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tailoring Microstructure and Tribological Properties of Cold Deformed TiZrAlV Alloy by Thermal Treatment

Zhang

Guo

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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“…A new β‐metastable high‐strength TiZrAlV alloy has been recently designed for aerospace applications . Previous studies demonstrate that the chemical properties of Zr and Ti are similar, these two metals have a stronger solid solution strengthening response and the β transition temperature of the ZrTi binary alloys can be modulated by varying the element contents .…”

mentioning

confidence: 99%

Enhancing Mechanical Properties of TiZrAlV by Engineering a Multi‐Modal‐Laminated Structure

Shi

Wang

et al. 2015

Adv Eng Mater

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In the present study, microstructure and mechanical properties of a new b-metastable TiZrAlV prepared via thermomechanical processing (TMP) treatments have been studied. An excellent combination of ultimate tensile strength (s b % 1 630 MPa) and ductility (e f % 6.6%) has been achieved in the alloy after cold rolling, thermal annealing (665 C/1 h), and two-step aging (650 C/ 0.5 h þ 450 C/2 h). This is attributed to the formation of a refined b microstructure with grain size of %10 mm and a multi-modal-laminated structure that consists of large primary a p grains (2 mm, 9.5 vol %) and coarse a precipitates (300 nm, 21 vol%) and fine a platelets (50 nm, 65 vol%). The fine a platelets contribute to high strength while the large primary a p grains and the refined b grain size provide ductility.b-Metastable titanium alloys have been considered attractive materials for widespread applications, such as aircraft design and automotive industries, because of the combination of high strength-to-density ratio (50-280 MPa cm 3 g À1 ), good corrosion resistance, and excellent fatigue property (e.g., HCF strength of 500-650 MPa at 10 7 cycles). [1,2] Mechanical properties of b-metastable Ti alloys are usually enhanced by the precipitation of fine secondary a phase using aging treatment, which leads to increased strength and decreased ductility. [1,2] However, at strength levels above 1 300 MPa, their practical applications (e.g., the material's service lifetime) have been limited by low ductility. [3] It is, therefore, significant to enhance the ductility of high-strength b-Ti alloys for practical applications, as the enhanced ductility can enhance the material's resistance to fatigue and extend the material's service lifetime. [4] Usually, the ductility of b-Ti alloys is controlled not only by b grain size but also by the morphology and distribution of a precipitates. [5,6] Previous studies show that a combination of a fine-grain b microstructure and the fine and uniform precipitation of a precipitates can lead to an exceptional combination of high strength and reasonable ductility in TIMETAL-LCB and b-21S alloys. [3,7] Recently, a multi-modal-laminated structure, [8][9][10][11][12] consisting of large a p grains and fine a precipitates or of coarse and fine a precipitates, has been extensively reported to achieve an excellent balance of strength (ultimate strength > 1 500 MPa) and ductility (elongation to failure > 6%) in many Ti alloys.A new b-metastable high-strength TiZrAlV alloy has been recently designed for aerospace applications. [13][14][15] Previous studies demonstrate that the chemical properties of Zr and Ti are similar, these two metals have a stronger solid solution strengthening response and the b transition temperature of the ZrTi binary alloys can be modulated by varying the element contents. [13,16,17] These favorable conditions may contribute to develop a new TiZrAlV alloy with excellent mechanical properties. However, the relationship between the microstructure and mechanical properties of this new TiZrAlV...

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Effect of grain size on α-variant selection in a ZrTiAlV alloy

Qiu

Liao

et al. 2019

Sci. China Technol. Sci.

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A hierarchical and multiphase nanolaminated alloy with an excellent combination of tensile properties

Cited by 14 publications

References 31 publications

Tailoring Microstructure and Tribological Properties of Cold Deformed TiZrAlV Alloy by Thermal Treatment

Tailoring Microstructure and Tribological Properties of Cold Deformed TiZrAlV Alloy by Thermal Treatment

Enhancing Mechanical Properties of TiZrAlV by Engineering a Multi‐Modal‐Laminated Structure

Effect of grain size on α-variant selection in a ZrTiAlV alloy

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