Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지
DOI QR코드

DOI QR Code

Visualization of Crack Propagation and Fracture Transition in Bulk Metallic Glass using Mechano-Luminescence

압광을 이용한 금속계 비정질 합금의 균열전파 및 파괴전이 현상 가시화 연구

  • 김지식 (경북대학교 나노소재공학부)
  • Received : 2011.03.17
  • Accepted : 2011.06.02
  • Published : 2011.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

Using a mechano-luminescent(ML) paint, which allows the visualization of fast propagating crack under conventional loading conditions, a catastrophic fracture mechanism associated to crack tip melting and wake bridging in bulk metallic glass, is described in this paper. Fracture occurs in two steps with, first, crack initiation from the mechanically machined sharp notch tip in a rectangular shaped compact tension specimen and melting of its tip due to intense shear deformation within very few deformation bands. Then, the crystalline phase in the glass matrix gradually converts the molten crack into a conventional bridged crack as it propagates.

Keywords

Acknowledgement

Supported by : 경북대학교

References

  1. Michael Miller,Peter K. Liaw, 2008, Bulk Metallic Glasses, Springer Science Business Media, ISBN;9780387489216.
  2. Jorg F. Löffler, 2003, Bulk metallic glasses, Intermetallics, Vol. 11, pp. 529-540. https://doi.org/10.1016/S0966-9795(03)00046-3
  3. Katharine M. Flores, Reinhold H. Dauskardt, 2004, Fracture and Deformation of Bulk Metallic Glasses and their composites, Intermertallics, Vol. 12, pp. 1025-1029. https://doi.org/10.1016/j.intermet.2004.05.004
  4. G. Yang, P. K. Liaw, G. Wang, M. Morrison, C. T. Liu, R. A. Buchanan, Y. Yokoyama, 2005, In-situ thermographic observation of mechanical damage in bulk-metallic glasses during fatigue and tensile experiments, Intermetallics, Vol. 12, pp. 1265-1274.
  5. K. S. Kim, J. S. Kim, H. Hoon, K. A. Lee, 2009, Tensile Deformation Behavior of Zr-based Bulk metallic Glass Composite with Different Strain Rate, Transactions of Materials Processing, Vol. 18, No. 6, pp. 500-507. https://doi.org/10.5228/KSPP.2009.18.6.500
  6. J.G. Lee, K.-S. Sohn, S. Lee, N. J. Kim, C. P. Kim, 2006, Fracture Toughness Analysis of Zr-Based Bulk Amorphous Alloys, J. Kor. Inst. Met. & Mater., Vol. 44, No. 5, pp. 308-315.
  7. K.-S. Sohn, S. Y. Seo, Y. N. Kwon, H. D. Park, 2002, Direct Observation of Crack Tip Stress Field Using the Mechanoluminescence of SrAl2O4: (Eu,Dy,Nd), J. Am. Ceram. Soc. Vol. 85, pp. 712-714.
  8. Ji Sik Kim, Yong-Nam Kwon, Kee-Sun Sohn, 2003, Dynamic visualization of crack propagation and bridgingstress using the mechanoluminescence of $SrAl_2O_4$:(Eu,Dy,Nd), Acta Mater. Vol. 51, pp. 6437-6442. https://doi.org/10.1016/j.actamat.2003.08.013
  9. J. S. Kim, Y. N. Kwon, N. Shin, K.-S. Sohn , 2005, Visualization of fractures in alumina ceramics by mechanoluminescence, Acta Mater., Vol. 53, pp. 4337-4343. https://doi.org/10.1016/j.actamat.2005.05.032
  10. J. S. Kim, Y. N. Kwon, N. Shin, K.-S. Sohn, 2007, Mechanoluminescent $SrAl_2O_4$:Eu,Dy phosphor for use in visualization of quasidynamic crack propagation, Appl. Phys. Lett., Vol. 90, pp. 241916-1-3. https://doi.org/10.1063/1.2748100
  11. J. S. Kim, H. J. Koh, W. D. Lee, N. Shin, J. G. Kim, K.-H. Lee, K.-S. Sohn, 2008, Quasi-dynamic visualization of crack propagation and wake evolution in Y-TZP ceramic by mechanoluminescence, Met. Mater. Int., Vol. 14, pp. 165-169. https://doi.org/10.3365/met.mat.2008.04.16
  12. J. S. Kim, K. Kibble, Y. N. Kwon, and K.-S. Sohn, 2009, Rate-equation model for the loading-ratedependent mechano-luminescence of $SrAl_2O_4$: Eu,Dy, Optical Letters, Vol. 34, pp. 1915-1917. https://doi.org/10.1364/OL.34.001915
  13. J. S. Kim, K. Kibble, M. Stanford, Y. N. Kwon, N. Shin, K.-S. Sohn, 2009, Quasi-dynamic visualization of crack propagation and bridging evolution in $Si_3N_4$ and SiC ceramics by mechanoluminescence, Met. Mater. Int., Vol. 15, pp. 597-602. https://doi.org/10.1007/s12540-009-0597-3
  14. ASTM standard test method for plane-strain fracture toughness of metallic materials, ASTM E399-83.

Cited by

  1. Quantitative Analysis of Mechano-luminescence and Its Mechanism in SAO vol.21, pp.4, 2012, https://doi.org/10.5228/KSTP.2012.21.4.246