Understanding Thermal Behavior in Lens Processing of Structural Materials

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Description

In direct laser metal deposition technologies, such as the Laser (LENS) process, it is important to understand and control the Engineered Net Shaping thermal behavior during fabrication. With this control, components can be reliably fabricated with desired structural material properties. This talk will describe the use of contact and imaging techniques to monitor the thermal signature during LENS processing. Recent results show a direct correlation between thermal history and material properties, where the residual stress magnitude decreases as the laser power, and therefore thermal signature, increases. Development of an understanding of solidification behavior, residual stress, and microstructural evolution with respect ... continued below

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Ensz, M.T.; Greene, D.L.; Griffith, M.L.; Harwell, L.D.; Hofmeister, W.H.; Nelson, D.V. et al. November 5, 1998.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Laboratories, Albuquerque, NM, and Livermore, CA
    Place of Publication: Albuquerque, New Mexico

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Description

In direct laser metal deposition technologies, such as the Laser (LENS) process, it is important to understand and control the Engineered Net Shaping thermal behavior during fabrication. With this control, components can be reliably fabricated with desired structural material properties. This talk will describe the use of contact and imaging techniques to monitor the thermal signature during LENS processing. Recent results show a direct correlation between thermal history and material properties, where the residual stress magnitude decreases as the laser power, and therefore thermal signature, increases. Development of an understanding of solidification behavior, residual stress, and microstructural evolution with respect to thermal behavior will be discussed.

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  • TMS Anual Meeting, Symposium on Surface Engineering: Science and Tech I; San Diego, CA; 02/28-03/04/1999

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  • Other: DE00001558
  • Report No.: SAND98-2475C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 1558
  • Archival Resource Key: ark:/67531/metadc620429

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  • November 5, 1998

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Dec. 8, 2016, 1:20 p.m.

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Ensz, M.T.; Greene, D.L.; Griffith, M.L.; Harwell, L.D.; Hofmeister, W.H.; Nelson, D.V. et al. Understanding Thermal Behavior in Lens Processing of Structural Materials, article, November 5, 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc620429/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.