Use of pulsed high power ion beams to enhance tribological properties of stainless steel, Ti, and Al

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Enhanced tribological properties have been observed after treatment with pulsed high power ion beams, which results in rapid melting and resolidification of the surface. The authors have treated and tested 440C martensitic stainless steel (Fe-17 Cr-1 C). Ti and Al samples were sputter coated and ion beam treated to produce surface alloying. The samples were treated at the RHEPP-I facility at Sandia National Laboratories (0.5 MV, 0.5--1 {micro}s at sample location, <10 J/cm{sup 2}, 1--5 {micro}m ion range). They have observed a reduction in size of second phase particles and other microstructural changes in 440C steel. The hardness of treated ... continued below

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15 p.

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Senft, D.C.; Renk, T.J.; Dugger, M.T.; Grabowski, K.S. & Thompson, M.O. April 1, 1998.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Enhanced tribological properties have been observed after treatment with pulsed high power ion beams, which results in rapid melting and resolidification of the surface. The authors have treated and tested 440C martensitic stainless steel (Fe-17 Cr-1 C). Ti and Al samples were sputter coated and ion beam treated to produce surface alloying. The samples were treated at the RHEPP-I facility at Sandia National Laboratories (0.5 MV, 0.5--1 {micro}s at sample location, <10 J/cm{sup 2}, 1--5 {micro}m ion range). They have observed a reduction in size of second phase particles and other microstructural changes in 440C steel. The hardness of treated 440C increases with ion beam fluence and a maximum hardness increase of a factor of 5 is obtained. Low wear rates are observed in wear tested of treated 440C steel. Surface alloyed Ti-Pt layers show improvements in hardness up to a factor of 3 over untreated Ti, and surface alloys of Al-Si result in a hardness increase of a factor of two over untreated Al. Both surface alloys show increased durability in wear testing. Rutherford Backscattering (RBS) measurements show overlayer mixing to the depth of the melted layer. X-ray Diffraction (XRD) and TEM confirm the existence of metastable states within the treated layer. Treated layer depths have been measured from 1--10 {micro}m.

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15 p.

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OSTI as DE98005487

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  • American Vacum Society conference on thin solid films (TSF) and surface and coatings technology (SCT), San Diego, CA (United States), 27 Apr - 1 May 1998

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  • Other: DE98005487
  • Report No.: SAND--98-1166C
  • Report No.: CONF-980429--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 658410
  • Archival Resource Key: ark:/67531/metadc704146

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  • April 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 14, 2016, 9:09 p.m.

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Senft, D.C.; Renk, T.J.; Dugger, M.T.; Grabowski, K.S. & Thompson, M.O. Use of pulsed high power ion beams to enhance tribological properties of stainless steel, Ti, and Al, article, April 1, 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc704146/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.