{"corpus_id":117878316,"paper_sha":"61b6ab316eaf452353ccfd9d8187886c66284c86","doi":"10.1063/1.1663148","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":1509048074,"dblp_id":null,"acl_id":null,"title":"Shock wave study of the α ⇄ ε phase transition in iron","year":1974,"publication_date":"1974-11-01","venue":"","journal":{"name":"Journal of Applied Physics","pages":"4872-4887","volume":"45"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Materials Science","Physics"],"reference_count":31,"citation_count":388,"influential_citation_count":11,"is_open_access":false,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":null,"s2_open_access_landing_url":null,"s2_open_access_license":null,"s2_open_access_status":null,"pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"Plate impact experiments producing plane waves of up to 40 GPa (400 kbar) peak stress were performed using Armco iron specimens and impactors. Highly accurate time-resolved measurements of the resulting free-surface velocities of the specimens were obtained with the VISAR laser interferometer instrumentation system. The free-surface velocity profiles provide new information concerning the rate effects associated with the α → ε polymorphic phase transition at 13 GPa, the material strength and release wave speeds at 10 and 40 GPa, and the stress level at which the iron reverts back to the α phase on unloading. A strong magnetic field was found to produce no measurable change in the phase-transition stress. The accuracy of the ``factor-of-2'' assumption relating free-surface velocity to particle velocity in iron was also evaluated experimentally.","claims":[{"public_id":"cl_b44ad3952d7c4e6b80db31699e86b3de","status":"active","text":"A strong magnetic field produced no measurable change in the phase-transition stress.","confidence":0.85,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_b44ad3952d7c4e6b80db31699e86b3de"},{"public_id":"cl_ac67b7d3214fe2f9fb1fdb7ef66e36bb","status":"active","text":"Plate impact experiments with Armco iron specimens and VISAR laser interferometer instrumentation provided highly accurate time-resolved free-surface velocity measurements up to 40 GPa peak 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