Subject: [Q] nickel precipitate-hardening steels

From: [email-masked] (Stan Malyshev)
Date: 27 Jun 1996 13:18:49 -0700

Hi folks,

I've recently read in a book (published in 1984) that maraging steels, while
exhibiting excellent strength and ductility (given the strength), performed
poorly when subjected to revesing load directions.

Has this problem been solved?  What's the current state of the art?

Thanks,
Stan

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From: [email-masked] (Jonathan M. Elson)
Date: 5 Jul 1996 05:00:26 GMT

Stan Malyshev ([email-masked]) wrote:

: Hi folks,

: I've recently read in a book (published in 1984) that maraging steels, while
: exhibiting excellent strength and ductility (given the strength), performed
: poorly when subjected to revesing load directions.

: Has this problem been solved?  What's the current state of the art?

The current state of the art is that the NRC (US Nuclear Regulatory
Agency) will get real interested if you try to get this grade of steel.
Apparently it is almost exclusively used in centrifuges for the separation
of Uranium isotopes, and thereby becomes a strategic material, and is
controlled under the nuclear non-proliferation accord.  I guess that the
use in centrifuges keeps the metal going between tension and relaxation,
but doesn't cause compression.  Perhaps even so, they have to severely
limit start-stop cycles, or anneal every so many cycles.