Journal of Materials Science

, Volume 43, Issue 1, pp 299–311 | Cite as

Effects of microcrack-damage on fracture behavior of TiAl alloy. Part II: load-controlled tensile test

  • Rui Cao
  • Hao Zhu
  • Jian Hong Chen
  • Ji Zhang


Specimens of a fully lamellar TiAl alloy and a duplex TiAl alloy were tensile tested using load-controlled procedure. The microcracks were measured for each specimen as it was subjected to various preloading–unloading processes. Loading–unloading–reloading processes of in-situ tensile tests were carried out in a scanning electron microscope (SEM). Effects of microcrack damage on the deformation and fracture behavior were evaluated. The following results of microcrack-damage on deformation and fracture behavior of TiAl alloy were found: (1) The apparent plastic elongation resulted mainly from plastic strain. The elongation caused by microcracks is negligible. (2) No appreciable effects of microcrack damage on the apparent elastic modulus could be found. (3) Microcracks damage produced at higher preloading reduced the fracture stress, however, that produced at lower preloading gave diminished effects.


Fracture Stress Final Fracture Main Crack Damage Parameter Crack Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was financially supported by the National Nature Science Foundation of China (No. 50471109) and Nature Science Foundation of GanSu Province (No. 3ZS061-A25-037). Authors express their sincere gratitude to Ms. Ello for her help in language editing.


  1. 1.
    Chan KS, Kim YW (1992) Metall Trans 23A:1663Google Scholar
  2. 2.
    Chan KS, Onsttot J, Kumar KS (2000) Metall Mater Trans 31A:71CrossRefGoogle Scholar
  3. 3.
    Inui H, Oh MH, Nakamura A, Yamakuchi M (1992) Acta Mater 40:3095CrossRefGoogle Scholar
  4. 4.
    Chan KS, Shih DS (1997) Metall Mater Trans 28A:79CrossRefGoogle Scholar
  5. 5.
    Campbell JP, Kruzic JJ, Lillibridge S, Venkateswara Rao KT, Ritchie RO (1997) Scripta Mater 37:707CrossRefGoogle Scholar
  6. 6.
    Arata JJM, Kumar KS, Curtin WA, Needleman A (2001) Inter J Fract 111:163CrossRefGoogle Scholar
  7. 7.
    Arata JJM, Kumar KS, Curtin WA, Needleman A (2002) Mater Sci Eng A329–331:532Google Scholar
  8. 8.
    Bowen P, Chave RA, James AW (1995) Mater Sci Eng 192/193A:443Google Scholar
  9. 9.
    Mercer C, Soboyejo WO (1997) Acta Mater 46:4385CrossRefGoogle Scholar
  10. 10.
    Kad BK, Dao M, Asaro RJ (1995) Phil Mag 71A:567Google Scholar
  11. 11.
    Frank GJ, Olson SE, Brockman RA (2003) Intermetallics 11:331CrossRefGoogle Scholar
  12. 12.
    Li J, Qiao S, Han D, Li M (2007) Mater Sci Eng A 471:106Google Scholar
  13. 13.
    Zheng RT, Zhang YG, Chen CQ (2004) J Mater Sci 39:1721CrossRefGoogle Scholar
  14. 14.
    Cao R, Zhu H, Chen JH, Zhang J, Yao HJ (2007) Mater. Sci. Eng. A, in pressGoogle Scholar
  15. 15.
    Chen JH, Cao R, Wang GZ, Zhang J (2004) Matall Mater Trans 35A:439CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Rui Cao
    • 1
    • 2
  • Hao Zhu
    • 1
    • 2
  • Jian Hong Chen
    • 1
    • 2
  • Ji Zhang
    • 3
  1. 1.State Key Laboratory of Gansu Advanced Non-ferrous Metal MaterialsLanzhou University of TechnologyLanzhouChina
  2. 2.Key Laboratory of Non-ferrous Metal Alloys, The Ministry of EducationLanzhou University of TechnologyLanzhouChina
  3. 3.China Iron and Steel Research Institute GroupBeijingChina

Personalised recommendations