{"id":37940,"date":"2024-10-28T09:11:05","date_gmt":"2024-10-28T08:11:05","guid":{"rendered":"https:\/\/quintustechnologies.com\/knowledge-center\/microstructure-mechanical-lpdf-ti-6al-4v\/"},"modified":"2025-12-02T09:02:35","modified_gmt":"2025-12-02T08:02:35","slug":"microstructure-mechanical-lpdf-ti-6al-4v","status":"publish","type":"knowledge-center","link":"https:\/\/quintustechnologies.com\/fr\/knowledge-center\/microstructure-mechanical-lpdf-ti-6al-4v\/","title":{"rendered":"Microstructure et propri\u00e9t\u00e9s m\u00e9caniques de la fusion laser sur lit de poudre de Ti-6Al-4V apr\u00e8s des traitements HIP \u00e0 des temp\u00e9ratures et vitesses de refroidissement vari\u00e9es"},"content":{"rendered":"<p>Cette \u00e9tude a examin\u00e9 des cycles de pressage isostatique \u00e0 chaud (HIP) non standard pour le PBF-L Ti-6Al-4V, en analysant la microstructure et les propri\u00e9t\u00e9s de r\u00e9sistance \u00e0 la traction. Des vitesses de refroidissement plus rapides (100 \u00b0C\/min, 2000 \u00b0C\/min) \u00e0 920 \u00b0C ont favoris\u00e9 une structure \u03b1 bi-lamellaire, 2000 \u00b0C\/min am\u00e9liorant la r\u00e9sistance. Des temp\u00e9ratures HIP plus basses (800 \u00b0C, 200 MPa) ont minimis\u00e9 le grossissement, am\u00e9liorant la r\u00e9sistance, tandis qu&rsquo;un refroidissement lent (12 \u00b0C\/min) a conduit \u00e0 la r\u00e9sistance la plus \u00e9lev\u00e9e en limitant la formation de martensite orthorhombique. \u00c0 1050 \u00b0C, l&rsquo;HIP a r\u00e9duit la texture cristallographique et entra\u00een\u00e9 la formation de grains prior-\u03b2 \u00e9quiaxes, am\u00e9liorant ainsi l&rsquo;isotropie, mais la vitesse de refroidissement de 2000 \u00b0C\/min n&rsquo;a pas emp\u00each\u00e9 la formation de joints de grains \u03b1, ce qui a r\u00e9duit la r\u00e9sistance et l&rsquo;allongement. L&rsquo;analyse en composantes principales (ACP) a \u00e9t\u00e9 utilis\u00e9e pour analyser l&rsquo;ensemble des donn\u00e9es.    <\/p>\n","protected":false},"featured_media":32252,"menu_order":0,"template":"","knowledge-center_materials":[553],"knowledge-center_processes":[363,580],"knowledge-center_language":[135],"knowledge-center_type":[625],"knowledge-center_industry":[347,350,356,244],"knowledge-center_topic":[235],"class_list":["post-37940","knowledge-center","type-knowledge-center","status-publish","has-post-thumbnail","hentry","knowledge-center_materials-titanium-alloy-fr","knowledge-center_processes-fabrication-additive","knowledge-center_processes-hip-et-traitement-thermique","knowledge-center_language-english","knowledge-center_type-publication-technique","knowledge-center_industry-aeronautique","knowledge-center_industry-defense","knowledge-center_industry-domaine-medical","knowledge-center_industry-space-fr","knowledge-center_topic-material-densification-fr"],"acf":[],"_links":{"self":[{"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/knowledge-center\/37940","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/knowledge-center"}],"about":[{"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/types\/knowledge-center"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/media\/32252"}],"wp:attachment":[{"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/media?parent=37940"}],"wp:term":[{"taxonomy":"knowledge-center_materials","embeddable":true,"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/knowledge-center_materials?post=37940"},{"taxonomy":"knowledge-center_processes","embeddable":true,"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/knowledge-center_processes?post=37940"},{"taxonomy":"knowledge-center_language","embeddable":true,"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/knowledge-center_language?post=37940"},{"taxonomy":"knowledge-center_type","embeddable":true,"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/knowledge-center_type?post=37940"},{"taxonomy":"knowledge-center_industry","embeddable":true,"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/knowledge-center_industry?post=37940"},{"taxonomy":"knowledge-center_topic","embeddable":true,"href":"https:\/\/quintustechnologies.com\/fr\/wp-json\/wp\/v2\/knowledge-center_topic?post=37940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}