{"id":177,"date":"2024-05-18T12:10:20","date_gmt":"2024-05-18T03:10:20","guid":{"rendered":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/?page_id=177"},"modified":"2024-05-18T12:10:21","modified_gmt":"2024-05-18T03:10:21","slug":"hightemp","status":"publish","type":"page","link":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/hightemp\/","title":{"rendered":"High temperature"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-dark-yellow-color has-text-color has-link-color wp-elements-0c968743d89f7fcaaf3ee287a4da4319\">\u25c6High-temperature fracture problem<\/h2>\n\n\n\n<p>The growing needs for energy efficient operation of modern gas turbines has boosted the use of sophisticated metallic materials (so-called superalloys) for blades attached to rotators. Since blades are subjected to an extremely high temperature environment, the evaluation of their life with a correct knowledge of crack growth mechanism has been an engineering issue.<br>\u3000Our original site-specific observation technique successfully unveiled the microscopic features at the crack tip region in a single-crystalline nickel-based superalloy. It was found that the formation of twin bands triggered the precipitation of elements, resulting in degradation and cracking along the bands.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"695\" height=\"412\" src=\"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-content\/uploads\/sites\/321\/2024\/05\/superalloy-fig1.jpg\" alt=\"\" class=\"wp-image-178\" srcset=\"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-content\/uploads\/sites\/321\/2024\/05\/superalloy-fig1.jpg 695w, https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-content\/uploads\/sites\/321\/2024\/05\/superalloy-fig1-300x178.jpg 300w, https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-content\/uploads\/sites\/321\/2024\/05\/superalloy-fig1-360x213.jpg 360w\" sizes=\"auto, (max-width: 695px) 100vw, 695px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"544\" src=\"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-content\/uploads\/sites\/321\/2024\/05\/superalloy-fig2.jpg\" alt=\"\" class=\"wp-image-179\" srcset=\"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-content\/uploads\/sites\/321\/2024\/05\/superalloy-fig2.jpg 768w, https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-content\/uploads\/sites\/321\/2024\/05\/superalloy-fig2-300x213.jpg 300w, https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-content\/uploads\/sites\/321\/2024\/05\/superalloy-fig2-360x255.jpg 360w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<p>For more detail, see\uff1a<\/p>\n\n\n\n<p><br>Y. Takahashi, D. Kobayashi, S. Fujii, M. Takuma, K. Saitoh, T. Sato, Time-dependent crack growth mechanism in Ni-based single crystal superalloys at high-temperature, Materials Science &amp; Engineering A, Vol. 859, 2022, 144179 (<a href=\"https:\/\/doi.org\/10.1016\/j.msea.2022.144179\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/doi.org\/10.1016\/j.msea.2022.144179<\/a>)<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Related study:<\/p>\n\n\n\n<p>Y. Takahashi, D. Kobayashi, M. Kashihara, T. Kozawa, S. Arai, Electron-microscopic analyses on high-temperature fatigue crack growth mechanism in a Ni-based single crystal superalloy, Materials Science &amp; Engineering A, Vol. 793, 2020, 139821 (<a href=\"https:\/\/doi.org\/10.1016\/j.msea.2020.139821\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/doi.org\/10.1016\/j.msea.2020.139821<\/a>)<\/p>\n\n\n\n<p>Y. Takahashi, D. Kobayashi, S. Fujii, S. Arai, M. Takuma, K. Saitoh, T. Sato, Time-dependent subcritical crack growth and its mechanism in Ni-based single crystal superalloys at 500 \u00b0C, Materials Science &amp; Engineering A, Vol. 889, 2024, 145869 (<a href=\"https:\/\/doi.org\/10.1016\/j.msea.2023.145869\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/doi.org\/10.1016\/j.msea.2023.145869<\/a>)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u25c6High-temperature fracture problem The g <a href=\"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/hightemp\/\" class=\"read-more\">Read More &#8230;<\/a><\/p>\n","protected":false},"author":330,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-177","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-json\/wp\/v2\/pages\/177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-json\/wp\/v2\/users\/330"}],"replies":[{"embeddable":true,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-json\/wp\/v2\/comments?post=177"}],"version-history":[{"count":1,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-json\/wp\/v2\/pages\/177\/revisions"}],"predecessor-version":[{"id":180,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-json\/wp\/v2\/pages\/177\/revisions\/180"}],"wp:attachment":[{"href":"https:\/\/wps.itc.kansai-u.ac.jp\/strength-e\/wp-json\/wp\/v2\/media?parent=177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}