Introducing transformation twins in titanium alloys: an evolution of α-variants during additive manufacturing

被引:39
作者
Wang, H. [1 ,2 ]
Chao, Q. [3 ]
Yang, L. [1 ,2 ]
Cabral, M. [1 ,2 ]
Song, Z. Z. [1 ,2 ]
Wang, B. Y. [1 ,2 ]
Primig, S. [4 ]
Xu, W. [3 ]
Chen, Z. B. [1 ,2 ]
Ringer, S. P. [1 ,2 ]
Liao, X. Z. [1 ,2 ]
机构
[1] Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia
[2] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia
[3] Deakin Univ, Fac Sci & Technol, Sch Engn, Waurn Ponds, Australia
[4] UNSW, Sch Mat Sci & Engn, Sydney, NSW, Australia
来源
MATERIALS RESEARCH LETTERS | 2021年 / 9卷 / 03期
基金
澳大利亚研究理事会;
关键词
Titanium alloy; additive manufacturing; twinning mechanism; variant selections;
D O I
10.1080/21663831.2020.1850536
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Titanium alloys can experience a cooling-induced phase transformation from a body-centred cubic phase into a hexagonal close-packed phase which occurs in 12 crystallographically equivalent variants. Among them, variant selection II, 60 degrees/< 1 (2) over bar 10 >, is very close to the orientation of {10 (1) over bar1} < 1 (2) over bar 10 > twins (57.42 degrees/< 1 (2) over bar 10 >). We propose that the cyclic thermal loading during additive manufacturing introduces large thermal stresses at high temperature, enabling grain reorientation that transforms the 60 degrees/< 1 (2) over bar 10 > variant boundaries into the more energetically stable 57.42 degrees/< 1 (2) over bar 10 > twin boundaries. This transformation twinning phenomenon follows a strain accommodation mechanism and the resulting boundary structure benefits the mechanical properties and thermal stability of titanium alloys. [GRAPHICS] . IMPACT STATEMENT A new twinning mechanism, transformation twinning, was discovered in a Ti- 6Al-4V alloy fabricated by selective laser melting. The resulting high density of transformation twins impact the global mechanical properties significantly.
引用
收藏
页码:119 / 126
页数:8
相关论文
共 32 条
  • [1] Variant selection and intervariant crystallographic planes distribution in martensite in a Ti-6Al-4V alloy
    Beladi, Hossein
    Chao, Qi
    Rohrer, Gregory S.
    [J]. ACTA MATERIALIA, 2014, 80 : 478 - 489
  • [2] Misorientations induced by deformation twinning in titanium
    Bozzolo, Nathalie
    Chan, Lisa
    Rollett, Anthony D.
    [J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2010, 43 : 596 - 602
  • [3] On the process of transition of the cubic-body-centered modification into the hexagonal-close-packed modification of zirconium
    Burgers, WG
    [J]. PHYSICA, 1934, 1 : 561 - 586
  • [4] Ultrafine Grain Formation in a Ti-6Al-4V Alloy by Thermomechanical Processing of a Martensitic Microstructure
    Chao, Qi
    Hodgson, Peter D.
    Beladi, Hossein
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2014, 45A (05): : 2659 - 2671
  • [5] Microstructural heterogeneity in hexagonal close-packed pure Ti processed by high-pressure torsion
    Chen, Y. J.
    Li, Y. J.
    Walmsley, J. C.
    Gao, N.
    Roven, H. J.
    Starink, M. J.
    Langdon, T. G.
    [J]. JOURNAL OF MATERIALS SCIENCE, 2012, 47 (12) : 4838 - 4844
  • [6] 3D electron backscatter diffraction study of a lath morphology in additively manufactured Ti-6Al-4V
    DeMott, Ryan
    Collins, Peter
    Kong, Charlie
    Liao, Xiaozhou
    Ringer, Simon
    Primig, Sophie
    [J]. ULTRAMICROSCOPY, 2020, 218
  • [7] Five-parameter intervariant boundary characterization of martensite in commercially pure titanium
    Farabi, Ehsan
    Hodgson, Peter D.
    Rohrer, Gregory S.
    Beladi, Hossein
    [J]. ACTA MATERIALIA, 2018, 154 : 147 - 160
  • [8] Additive manufacturing of metals: a brief review of the characteristic microstructures and properties of steels, Ti-6Al-4V and high-entropy alloys
    Gorsse, Stephane
    Hutchinson, Christopher
    Goune, Mohamed
    Banerjee, Rajarshi
    [J]. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2017, 18 (01) : 584 - 610
  • [9] Slip band-grain boundary interactions in commercial-purity titanium
    Guo, Y.
    Britton, T. B.
    Wilkinson, A. J.
    [J]. ACTA MATERIALIA, 2014, 76 : 1 - 12
  • [10] ON THE OCCURRENCE OF MULTIPLY TWINNED PARTICLES IN ELECTRODEPOSITED NICKEL FILMS
    HALL, CR
    FAWZI, SAH
    [J]. PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1986, 54 (06): : 805 - 820