A Martensitic Reaction for Uranium

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Hardness measurements of specimens quenched from the beta yields alpha phase at different cooling rates support the proposed martensitic beta yields alpha transformation for urnnium. Specimens held in 635 and 600 deg C isothermal baths prior to subsequent quenching to --5 deg C require more than 10 and two seconds, respectively before diffusion mechanlsms for beta yields alpha transformation commence. Once started, about 500 seconds are required to complete transformation by diffusion at these temperatures. Specimens quenched prior to tais hold time transform in part martensitically. Relationships are calculated for hardness as a function of grain size and cooling rate, ... continued below

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Pages: 26

Creation Information

Bement, A. L. & Wallace, W. P. June 25, 1957.

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  • Hanford Atomic Products Operation
    Publisher Info: General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
    Place of Publication: Richland, Washington

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Description

Hardness measurements of specimens quenched from the beta yields alpha phase at different cooling rates support the proposed martensitic beta yields alpha transformation for urnnium. Specimens held in 635 and 600 deg C isothermal baths prior to subsequent quenching to --5 deg C require more than 10 and two seconds, respectively before diffusion mechanlsms for beta yields alpha transformation commence. Once started, about 500 seconds are required to complete transformation by diffusion at these temperatures. Specimens quenched prior to tais hold time transform in part martensitically. Relationships are calculated for hardness as a function of grain size and cooling rate, and for grain size as a function of cooling rate. Metallographic examination confirms the hardness trends and reveals that widely varied grain structures can be produced by controlled cooling from the beta phase. Finally, a schematic time- temperature-transformation curve is sketched from the hardness data obtained. (auth)

Physical Description

Pages: 26

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NTIS

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  • Other Information: Orig. Receipt Date: 31-DEC-58

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  • Report No.: HW-51084(Rev.)
  • Grant Number: W-31-109-ENG-52
  • DOI: 10.2172/4312306 | External Link
  • Office of Scientific & Technical Information Report Number: 4312306
  • Archival Resource Key: ark:/67531/metadc1018730

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • June 25, 1957

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • Dec. 20, 2017, 3:02 p.m.

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Bement, A. L. & Wallace, W. P. A Martensitic Reaction for Uranium, report, June 25, 1957; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1018730/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.