{"686469":{"#nid":"686469","#data":{"type":"event","title":"Wear and Corrosion Behavior of a Stainless Steel Composite Produced by Laser Powder Bed Fusion (L-PBF)","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EBrenda Juliet Martins Freitas\u003C\/strong\u003E\u003Cbr\u003EMaterials Engineer\u003Cbr\u003EFederal University of Technology \u2013 Paran\u00e1 (UTFPR)\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EThursday, November 20\u003C\/strong\u003E\u003Cbr\u003E9 - 10 a.m.\u003Cbr\u003E*Location: Callaway\/GTMI bldg.,\u003Cbr\u003ERoom 114\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003ECoffee and light refreshments provided.\u0026nbsp;\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003E*This is an in-person only event and will not be streamed virtually.\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\u003Ch3\u003E\u003Ca href=\u0022https:\/\/www.eventbrite.com\/e\/gtmi-lecture-series-fall-2025-dr-brenda-juliet-martins-freitas-tickets-1967648202742?aff=oddtdtcreator\u0022\u003ERegister here.\u003C\/a\u003E\u003C\/h3\u003E\u003Cp\u003E\u003Cbr\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003EAdditive manufacturing of metallic alloys often leads to defects such as cracking, anisotropy, brittleness, and coarse columnar grains. In this study, boron-containing stainless steel composites were successfully fabricated by Laser Powder Bed Fusion (L-PBF). The addition of boron transformed coarse columnar grains (~200 \u00b5m) into equiaxed ultrafine grains (~1 \u00b5m). Moreover, boron promoted the in-situ formation of nanometric Cr\u2082B precipitates decorating the grain boundaries. The printed samples exhibited comparable corrosion resistance to commercial duplex stainless steels in chloride-rich environments, while showing a marked enhancement in hardness and wear resistance, attributed to the grain refinement and presence of hard borides. These results demonstrate that controlled boron addition is a promising strategy for microstructural tailoring and surface performance improvement in stainless steels produced by additive manufacturing.\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EBio: \u003C\/strong\u003EDr. Brenda Juliet Martins Freitas is a Materials Engineer from the Federal University of Technology \u2013 Paran\u00e1 (UTFPR). She holds a Master\u2019s and a Ph.D. in Materials Science and Engineering from the Federal University of S\u00e3o Carlos (UFSCar, Brazil), with a dual-degree Ph.D. from Graz University of Technology (Austria). Currently, she is a Postdoctoral Researcher at UFSCar in collaboration with Petrobras, and a temporary lecturer at the Department of Materials Engineering (DEMa\/UFSCar). Her research focuses on additive manufacturing of metallic materials, hydrogen embrittlement in titanium alloys, and corrosion behavior of advanced alloys. \u0026nbsp;\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EGTMI Lecture Series: Brenda Juliet Martins Freitas, Federal University of Technology \u2013 Paran\u00e1\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"GTMI Lecture Series: Brenda Juliet Martins Freitas, Federal University of Technology \u2013 Paran\u00e1"}],"uid":"35575","created_gmt":"2025-11-16 23:37:02","changed_gmt":"2025-11-16 23:50:43","author":"adavidson38","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2025-11-20T09:00:00-05:00","event_time_end":"2025-11-20T10:00:00-05:00","event_time_end_last":"2025-11-20T10:00:00-05:00","gmt_time_start":"2025-11-20 14:00:00","gmt_time_end":"2025-11-20 15:00:00","gmt_time_end_last":"2025-11-20 15:00:00","rrule":null,"timezone":"America\/New_York"},"location":"GTMI Building Rm. 114, 813 Ferst Drive Northwest Atlanta, GA 30332","extras":["freebies"],"groups":[{"id":"155831","name":"Georgia Tech Manufacturing Institute (GTMI)"}],"categories":[],"keywords":[{"id":"189814","name":"go-researchevents"},{"id":"186857","name":"go-gtmi"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}