Self-hardening

Definitions

  • Webster's Revised Unabridged Dictionary
    • a Self-hardening (Metal) Designating, or pert. to, any of various steels that harden when heated to above a red heat and cooled in air, usually in a blast of cold air with moderate rapidity, without quenching. Such steels are alloys of iron and carbon with manganese, tungsten and manganese, chromium, molybdenum and manganese, etc. They are chiefly used as high-speed steels.
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Usage

In literature:

Colonel D'Hubert himself, hardened to exposure, suffered mainly in his self-respect from the lamentable indecency of his costume.
"A Set of Six" by Joseph Conrad
Mrs. Malpas, pretty and vivacious, with a self-conceit hardened by the adulation of saloon-bars, very decidedly thought otherwise.
"Tales of the Five Towns" by Arnold Bennett
Jackson had hardened himself to iron, and gave his lying evidence with ruthless self-possession.
"The International Monthly Magazine, Volume 5, No. 1, January, 1852" by Various
Bill's life and Fred's and Teddy's recent experiences in the West had hardened and toughened them and also made them more self-reliant.
"The Rushton Boys at Treasure Cove" by Spencer Davenport
It is a kind of obstinate and self-willed folly, in which he hardens himself.
"Leigh Hunt's Relations with Byron, Shelley and Keats" by Barnette Miller
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In science:

Merritt & Poon (2004) built self-consistent cuspy, triaxial models with a single SMBH at the center and showed that such models could be concocted with a significant fraction of centrophilic orbits that would efficiently drive the hardening rate of a binary if it were present at the center.
Mergers of Unequal Mass Galaxies: Supermassive Black Hole Binary Evolution and Structure of Merger Remnants
Later, several studies built self-consistent cuspy, triaxial models with a single central SMBH and showed that models could be concocted with a significant fraction of centrophilic orbits that would efficiently drive the hardening rate of a binary if it were present (e.g.
Supermassive Black Hole Binary Evolution in Axisymmetric Galaxies: the final parsec problem is not a problem
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