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Abstract:

We describe a technique that allows rapid imaging of the thermal diffusivity of the sample by a modified photo-thermal technique. The thermal diffusivity in hardened steels strongly correlates to the hardness. Hence in a noncontact manner and with optical microscope resolution, a 2D map exhibiting the crystallographic phases and hardness of the sample can be retrieved. Two almost collinear laser beams scan the surface, one as a modulated pump and a second as a CW probe. The deflection of the probe carries information on the thermal expansion of the sample and with it, on the thermal diffusivity. It is shown that a single determination of the time delay of the modulation of the probe beam can be used to retrieve the thermal diffusivity.

Registro:

Documento: Conferencia
Título:2D imaging of nano-hardness and phase characterization in steel by noncontact optical photodeflection microscopy
Autor:Archiopoli, U.C.; Mingolo, N.; Martínez, O.E.
Ciudad:Seattle, WA
Filiación:Universidad de Buenos Aires, Facultad de Ingeniería, Dto. Física, Buenos Aires, Argentina
Universidad de Buenos Aires, Facultad de Ciencias Exactas, Dto. Física, Buenos Aires, Argentina
CONICET, Argentina
Palabras clave:Hardness; Surface characterization; Thermal diffusivity; 2D imaging; Collinear lasers; Crystallographic phasis; Hardened steel; Non-contact; Optical microscopes; Phase characterization; Photo-thermal; Probe beam; Rapid imaging; Surface characterization; Hardness; Probes; Pumping (laser); Surface properties; Thermal diffusion; Thermal diffusivity; Thermal expansion
Año:2010
Página de inicio:17
Página de fin:23
Título revista:EPD Congress 2010 - TMS 2010 Annual Meeting and Exhibition
Título revista abreviado:TMS Annu Meet
CODEN:85MVA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97816178_v_n_p17_Archiopoli

Referencias:

  • Oliver, W.C., Pharr, G.M., Improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments (1992) Journal of Materials Research, 7 (6), pp. 1564-1580
  • Boubaker, K.M., Bouhafs, M., Yacoubi, N., A Quantitative Alternative to the Vickers Hardness Test Based on a Correlation between Thermal Diffusivity and Hardness - Applications to Laser-Hardened Carburized Steel (2003) NDT&E International, 36, pp. 547-552
  • Boubaker, K.M., Effects of Carburizing Treatment on First-Order Correlation between Steel Vickers Hardness and Thermal Diffusivity (2005) Journal of Testing and Evaluation, 33, pp. 532-536
  • Ghrib, T., Boubaker, K.M., Bouhafs, M., Yacoubi, N., Investigation of Thermal Diffusivity-Microhardness Correlation Extended to Surface-Nitrured Steel Using Boubaker Polynomials Expansion (2008) Modern Physics Letters B, 22, pp. 2893-2907
  • Lan, T.T.N., Walther, H.G., A Photothermal Depth Profiling Using only Phase Data (1996) Journal of Applied Physics, 80, pp. 5289-5291
  • Walther, H.G., Fournier, D., Krapez, J.C., Luukkala, M., Schmitz, B., Sibilia, C., Stamm, H., Thoen, J., Photothermal Steel Hardness Measurements - Results and Perspectives (2001) Analytical Sciences, 17, pp. 165-168
  • Martinez, O.E., Balzarotti, F., Mingolo, N., Thermoreflectance and photodeflection combined for microscopic characterization of metallic surfaces (2008) Applied Physics B: Lasers and Optics, 90 (1), pp. 69-77. , DOI 10.1007/s00340-007-2847-8
  • Crossa Archiopoli, U., Mingolo, N., Martínez, O.E., 2D imaging of thermal diffusivity in metals by scanning photodeflection detection (2009) Journal of Applied Physics, , Sent for publication
  • Cesa, Y., Mingolo, N., Martínez, O.E., Optimization of the Driving Circuit for Material Processing with a Pulsed Glow Discharge (2000) IEEE Transactions on Plasma Science, 28, pp. 1035-1042
  • Mingolo, N., Cesa, Y., Martínez, O.E., Etcheverry, J.I., Rocca, J.J., Enhanced Energy Deposition Efficiency of Glow Discharge Electron Beams for Metal Surface Treatment (2000) IEEE Transactions on Plasma Science, 28, pp. 386-393
  • Mingolo, N., Gonzalez, C.R., Martinez, O.E., Rocca, J.J., Stabilization of a cold cathode electron beam glow discharge for surface treatment (1997) Journal of Applied Physics, 82 (8), pp. 4118-4120
  • Marino Belçaguy, P., Mingolo, N., Martínez, O.E., Measurement of the Current Density Profile of a Pulsed Electron Beam for Surface Treatment (2003) IEEE Transactions on Plasma Science, 31, pp. 788-792
  • Archiopoli, U.C., Mingolo, N., Martinez, O.E., Structures appearing in roughened steel surfaces obtained by self-dewetting with electron beams (2005) Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 36 (4), pp. 999-1006
  • Mingolo, N., Roviglione, A.N., Martinez, O.E., Transient self-dewetting of steels after pulsed electron beam melting (2001) Journal of Materials Research, 16 (8), pp. 2343-2349
  • Crossa Archiopoli, U., Mingolo, N., Mingolo, N., Generation of Hardened Steel Surfaces with Adjustable Roughness by Means of a Pulsed Electron Beam (2008) Surface and Coatings Technology, 202, pp. 5982-5990A4 - Extr. Process. Div. (EPD) Miner., Metals, Mater. Soc. (TMS)

Citas:

---------- APA ----------
Archiopoli, U.C., Mingolo, N. & Martínez, O.E. (2010) . 2D imaging of nano-hardness and phase characterization in steel by noncontact optical photodeflection microscopy. EPD Congress 2010 - TMS 2010 Annual Meeting and Exhibition, 17-23.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97816178_v_n_p17_Archiopoli [ ]
---------- CHICAGO ----------
Archiopoli, U.C., Mingolo, N., Martínez, O.E. "2D imaging of nano-hardness and phase characterization in steel by noncontact optical photodeflection microscopy" . EPD Congress 2010 - TMS 2010 Annual Meeting and Exhibition (2010) : 17-23.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97816178_v_n_p17_Archiopoli [ ]
---------- MLA ----------
Archiopoli, U.C., Mingolo, N., Martínez, O.E. "2D imaging of nano-hardness and phase characterization in steel by noncontact optical photodeflection microscopy" . EPD Congress 2010 - TMS 2010 Annual Meeting and Exhibition, 2010, pp. 17-23.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97816178_v_n_p17_Archiopoli [ ]
---------- VANCOUVER ----------
Archiopoli, U.C., Mingolo, N., Martínez, O.E. 2D imaging of nano-hardness and phase characterization in steel by noncontact optical photodeflection microscopy. TMS Annu Meet. 2010:17-23.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97816178_v_n_p17_Archiopoli [ ]