The prediction of microstructure in low-chromium substitutes for stainless steels.

Details

• Personal Author:
  Glenn, Max L.
• Description:
  Previous Bureau of Mines research has shown that additions of si and al can partially replace the cr in stainless steels for use in oxidation-resistant applications. Because an austenitic microstructure is desired for optimum mechanical properties, a series of fe-(4 to 12)cr-(8 to 18)ni-(0 to 8)si-(0 to 6)al-1mn-0.05C alloys were metallographically examined to determine the compositions that stabilized this austenitic microstructure and inhibited the formation of ferrite or martensite. A series of fe- 1mn-0.05C-si-al metastable phase diagrams for various cr and ni contents were drawn to provide better predictions of alloy microstructure than does the schaeffler diagram. At the 8- to 10- pct cr level, an austenitic region is formed only when ni is at least 14 pct. An equation was developed to correlate the austenite and/or ferrite content to cr- and ni-equivalent relationships. A second equation was developed to predict the transformation of austenite to martensite. These relationships can be used to predict alloy microstructure for fe-base alloys containing 4 to 12 pct cr. [Description provided by NIOSH]
• Subjects:
  Chromium Ferrous Compounds Mining Nickel Occupational Health Safety
• Keywords:
  Mining; Stainless steel; Oxidation; Mechanical properties; Alloys; Chromium; Chromium compounds; Nickel; Nickel compounds; Metallic compounds; Iron; Iron compounds; Nickel; Nickel compounds
• Series:
  Mining Publications
• Document Type:
  Text
• Genre:
  Journal Article
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  ALRC - Albany Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  181-191
• Volume:
  10
• Issue:
  3
• NIOSHTIC Number:
  nn:10006578
• Citation:
  J Mater Eng 1988; 10(3):181-191
• CAS Registry Number:
  Chromium (CAS RN 7440-47-3) ; Iron (CAS RN 7439-89-6) ; Nickel (CAS RN 7440-02-0) ; Stainless Steel (CAS RN 12597-68-1)
• Federal Fiscal Year:
  1988
• Peer Reviewed:
  False
• Source Full Name:
  J. Mater. Eng., V. 10, No. 3, 1988, PP. 181-191
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/246667/cdc_246667_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]