[ { "id": "https://authors.library.caltech.edu/records/6dhqj-th712", "eprint_id": 54133, "eprint_status": "archive", "datestamp": "2023-08-19 02:05:16", "lastmod": "2023-10-19 23:40:11", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vreeland-T-Jr", "name": { "family": "Vreeland", "given": "T., Jr." } }, { "id": "Wood-D-S", "name": { "family": "Wood", "given": "D. S." } }, { "id": "Clark-D-S", "name": { "family": "Clark", "given": "D. S." } } ] }, "title": "A study of the mechanism of the delayed yield phenomenon", "ispublished": "unpub", "full_text_status": "public", "note": "Manuscript received January 2, 1952.\n\nThis investigation was conducted under the sponsorship of the\nOffice of Naval Research. The rapid-load testing machine used in this\ninvestigation was constructed by the California Institute of Technology\nunder a contract with the United States Air Force. Appreciation\nis expressed to the U. S. Air Force for permission to use the\nmachine.\n\n
Submitted - A_Study_of_the_Mechanism_of_the_Delayed_Yield_Phenomenon.pdf
", "abstract": "This paper presents the results of an experimental investigation\nof the behavior of an annealed low carbon steel\nsubjected to a rapidly applied constant stress and to repeated\nshort-duration stress-pulses. The test stresses were\ngreater than the upper yield stress. The material was aged\nat various temperatures between stress-pulses, and the\neffect of the time of aging on the number of stress-pulses\nto induce yielding was determined.\n\nPlastic and anelastic microstrain of the order of 30 X\n10^(-6) in./in. is observed prior to the onset of yielding in\nrapidly applied constant stress tests and in repeated stress-pulse\ntests. Aging of the specimens for a sufficient length\nof time at a given temperature between stress-pulses induces\nrecovery in the material such that yielding does not\noccur in repeated stress-pulse and aging cycles. The activation\nenergy of the recovery process corresponds, within\nthe limits of the experimental accuracy, to the activation\nenergies of carbon and nitrogen diffusion in iron.\n\nThese effects are discussed in terms of the dislocation\ntheory of yielding. The, delayed yield and the microstrain\nare attributed to the action of dislocations within the\ncrystals of the material. The recovery process is attributed\nto the diffusion of carbon and nitrogen to the dislocations\nwhich have been displaced, thus stabilizing the array of\ndislocations for the particular stress condition.", "date": "2015-01-27", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150127-095801782", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150127-095801782", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Office of Naval Research (ONR)" }, { "agency": "U.S. Air Force" } ] }, "collection": "CaltechAUTHORS", "primary_object": { "basename": "A_Study_of_the_Mechanism_of_the_Delayed_Yield_Phenomenon.pdf", "url": "https://authors.library.caltech.edu/records/6dhqj-th712/files/A_Study_of_the_Mechanism_of_the_Delayed_Yield_Phenomenon.pdf" }, "resource_type": "monograph", "pub_year": "2015", "author_list": "Vreeland, T., Jr.; Wood, D. S.; et el." } ]