AN ELECTRON-METALLOGRAPHIC STUDY OF EMBRITTLEMENT IN AN 18NI-8CO-MO MARAGING STEEL.
Abstract
Recent information has indicated that 18Ni-8Co-Mo type maraging steels can be embrittled by holding at 1400 F during the solution annealing treatment. Thus, heavy maraging-steel plates (2 in. thick and over) may be embrittled during solution annealing because they would cool slowly at temperatures in the vicinity of 1400 F. Because steel plates up to 4 in. thick are required for submarine-hull weldments, this embrittling tendency might severely limit the use of maraging steels in this application. Therefore, a metallographic study was initiated to determine the cause of the embrittlement in specimens of a 250ksi maraging steel submitted by INCO. Lightmicroscopy, electron-microscopy, X-ray-diffraction, electron-diffraction, and microprobe techniques were used in the investigation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 27, 1963
- Accession Number
- AD0423805
Entities
People
- A. J. Birkle
- D. S. Dabkowski
- G. R. Speich
- Lew F. Porter
Organizations
- U.S. Steel