From: owner-ammf-digest@smoe.org (alt.music.moxy-fruvous digest) To: ammf-digest@smoe.org Subject: alt.music.moxy-fruvous digest V14 #10582 Reply-To: ammf@fruvous.com Sender: owner-ammf-digest@smoe.org Errors-To: owner-ammf-digest@smoe.org Precedence: bulk alt.music.moxy-fruvous digest Tuesday, January 24 2023 Volume 14 : Number 10582 Today's Subjects: ----------------- Harvard: Deadly Breakfast Habit Accelerates Dementia by 82%... ["Dementia] ---------------------------------------------------------------------- Date: Tue, 24 Jan 2023 13:30:03 +0100 From: "Dementia Warning" Subject: Harvard: Deadly Breakfast Habit Accelerates Dementia by 82%... Harvard: Deadly Breakfast Habit Accelerates Dementia by 82%... http://brainsaviorr.shop/Ta9dG8S3jdu8E5bYJRuQzdc1jcT4jgiorhKvZTHF1hBB-3WKwg http://brainsaviorr.shop/0-Bd3_F-Ccq-4W4zT0TchbhbriLQSTbMcWh4F-7vaD_qBdq0Cw te cast iron displays white fractured surfaces due to the presence of an iron carbide precipitate called cementite. With a lower silicon content (graphitizing agent) and faster cooling rate, the carbon in white cast iron precipitates out of the melt as the metastable phase cementite, Fe3C, rather than graphite. The cementite which precipitates from the melt forms as relatively large particles. As the iron carbide precipitates out, it withdraws carbon from the original melt, moving the mixture toward one that is closer to eutectic, and the remaining phase is the lower iron-carbon austenite (which on cooling might transform to martensite). These eutectic carbides are much too large to provide the benefit of what is called precipitation hardening (as in some steels, where much smaller cementite precipitates might inhibit [plastic deformation] by impeding the movement of dislocations through the pure iron ferrite matrix). Rather, they increase the bulk hardness of the cast iron simply by virtue of their own very high hardness and their substantial volume fraction, such that the bulk hardness can be approximated by a rule of mixtures. In any case, they offer hardness at the expense of toughness. Since carbide makes up a large fraction of the material, white cast iron could reasonably be classified as a cermet. White iron is too brittle for use in many structural components, but with good hardness and abrasion resistance and relatively low cost, it finds use in such applications as the wear surfaces (impeller and volute) of slurry pumps, shell li ------------------------------ End of alt.music.moxy-fruvous digest V14 #10582 ***********************************************