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YAO Xuefeng, FU Liming, SHAN Aidang. Microstructure and Mechanical Properties of Ultrafine-Grained TC4 Titanium Alloy Prepared by Severe Hot Rolling[J]. Materials and Mechanical Engineering, 2018, 42(3): 57-61,66. DOI: 10.11973/jxgccl201803011
Citation: YAO Xuefeng, FU Liming, SHAN Aidang. Microstructure and Mechanical Properties of Ultrafine-Grained TC4 Titanium Alloy Prepared by Severe Hot Rolling[J]. Materials and Mechanical Engineering, 2018, 42(3): 57-61,66. DOI: 10.11973/jxgccl201803011

Microstructure and Mechanical Properties of Ultrafine-Grained TC4 Titanium Alloy Prepared by Severe Hot Rolling

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  • Received Date: January 20, 2017
  • Revised Date: November 04, 2017
  • The ultrafine-grained TC4 titanium alloy was produced by severe hot rolling for 2-4 passes at start rolling temperature of 1 100℃ with 70 t rolling mill, and the effects of rolling reduction (60%-90%) on the microstructure and mechanical properties of the alloy were investigated. The results show that the lamellar structures of α and β phases in TC4 titanium alloy were deformed to ultrafine structures by dynamic recrystallization during hot rolling, and dislocations were retained in the microstructures because of the incompletion of dynamic recrystallization. With the reduction increasing, the number of ultrafine grains increased, the grain size decreased, the tensile strength of the alloy increased, the plasticity was kept well, and the tensile fracture occurred by ductile mode. After 90% severe hot rolling, the high-strength high-ductile ultrafine-grained TC4 titanium alloy was produced, with average grain size of 150 nm, tensile strength of 1 135 MPa and elongation above 9%.
  • [1]
    LVTJERING G, WILLIAMS J C. Titanium[M]. Berlin:Springer, 2007.
    [2]
    LEYENS C, PETERS M. Titanium and titanium alloys:Fundamentals and applications[M].Weinheim:Wiley-VCH,2003.
    [3]
    SERGUEEVA A V, STOLYAROV V V, VALIEV R Z, et al. Enhanced superplasticity in a Ti-6Al-4V alloy processed by severe plastic deformation[J]. Scripta Materialia, 2000, 43(9):819-824.
    [4]
    SEMENOVA I P, RAAB G I, SAITOVA L R, et al. The effect of equal-channel angular pressing on the structure and mechanical behavior of Ti-6Al-4V alloy[J]. Materials Science and Engineering A, 2004, 387/388/389:805-808.
    [5]
    ZHANG Y, SATO Y S, KOKAWA H, et al. Microstructural characteristics and mechanical properties of Ti-6Al-4V friction stir welds[J]. Materials Science and Engineering A, 2008, 485(1/2):448-455.
    [6]
    ZHEREBTSOV S, SALISHCHEV G, OJKOWSKI W. Strengthening of a Ti-6Al-4V titanium alloy by means of hydrostatic extrusion and other methods[J]. Materials Science and Engineering A, 2009, 515(1/2):43-48.
    [7]
    SEMENOVA I P, RAAB G I, GOLUBOVSKIY E R, et al. Service properties of ultrafine-grained Ti-6Al-4V alloy at elevated temperature[J]. Journal of Materials Science, 2013, 48(13):4806-4812.
    [8]
    KIM Y, KIM E P, SONG Y B, et al. Microstructure and mechanical properties of hot isostatically pressed Ti-6Al-4V alloy[J]. Journal of Alloys and Compounds, 2014, 603:207-212.
    [9]
    ZHEREBTSOV S V, SALISHCHEV G A, GALEYEV R M, et al. Production of submicrocrystalline structure in large-scale Ti-6Al-4V billet by warm severe deformation processing[J]. Scripta Materialia, 2004, 51(12):1147-1151.
    [10]
    FU B, FU L, WANG H, et al. Microstructures and deformation behavior of nano-grained and ultrafine-grained high-Mn austenitic steel fabricated by asymmetric-symmetric rolling[C]//IOP Conference Series:Materials Science and Engineering.[S.l.]:IOP Publishing, 2014.
    [11]
    方建敏, 张杏耀, 单爱党,等. 累积叠轧焊不锈钢的组织和性能[J]. 机械工程材料, 2006, 30(8):16-18.
    [12]
    蒋建华, 丁毅, 陈云龙, 等. 异步轧制TWIP钢的力学性能和微观组织[J]. 钢铁, 2011, 46(11):77-81.
    [13]
    SUN Y, XU S, SHAN A. Effects of annealing on microstructure and mechanical properties of nano-grained Ni-based alloy produced by severe cold rolling[J]. Materials Science and Engineering A, 2015, 641:181-188.
    [14]
    LI Z, FU L, FU B, et al. Effects of annealing on microstructure and mechanical properties of nano-grained titanium produced by combination of asymmetric and symmetric rolling[J]. Materials Science and Engineering A, 2012, 558:309-318.
    [15]
    LI Z, FU L, FU B, et al. Nanoindentation hardness and elastic modulus of nano-grained titanium produced by asymmetric and symmetric rolling[J]. Journal of Nanoscience and Nanotechnology, 2014, 14(10):7740-7744.
    [16]
    MATSUMOTO H, BIN L, LEE S H, et al. Frequent occurrence of discontinuous dynamic recrystallization in Ti-6Al-4V Alloy with α' martensite starting microstructure[J]. Metallurgical and Materials Transactions A, 2013, 44(7):3245-3260.
    [17]
    STOLYAROV V V, ZHU Y T, LOWE T C, et al. A two step SPD processing of ultrafine-grained titanium[J]. Nanostructured Materials, 1999, 11(7):947-954.
    [18]
    束德林. 工程材料力学性能[M]. 北京:机械工业出版社, 2003.

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