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Title:
SOLIDIFICATION REFINEMENT AND GENERAL PHASE TRANSFORMATION CONTROL THROUGH APPLICATION OF IN SITU GAS JET IMPINGEMENT IN METAL ADDITIVE MANUFACTURING
Document Type and Number:
WIPO Patent Application WO/2019/002563
Kind Code:
A3
Abstract:
Provided are a jet device and systems and methods using the jet device for manufacturing objects by additive manufacturing, especially titanium and titanium alloy objects, wherein the jet device directs a cooling gas across a liquid molten pool, or to impinge on the liquid molten pool, or to impinge upon a solidified material adjacent to a liquid-solid boundary of the liquid molten pool, or to impinge on an as-solidified material, or any combination thereof, during the additive manufacturing process. The application of the cooling gas can result in an additively manufactured metal product having refined grain structure with a high proportion of the grains being approximately equiaxed, and can yield an additively manufactured product exhibiting improvements in strength, fatigue resistance, and durability.

Inventors:
MATHISEN, Martin Borlaug (Stabellsgate 9, Leil 211, HØNEFOSS, N-3510, NO)
LARSEN, Hilde Løken (Flyplassveien 20, HØNEFOSS, N-3514, NO)
Application Number:
EP2018/067608
Publication Date:
February 21, 2019
Filing Date:
June 29, 2018
Export Citation:
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Assignee:
NORSK TITANIUM AS (Flyplassveien 20, HØNEFOSS, N-3514, NO)
International Classes:
B22F3/105; B23K26/342; B33Y10/00; B33Y30/00; B33Y50/02; B22F3/10
Foreign References:
EP2502729A12012-09-26
US20150108094A12015-04-23
DE102015117238A12017-04-13
EP1637274A12006-03-22
CN105855549A2016-08-17
EP2969383A12016-01-20
US20160067920A12016-03-10
Other References:
W.P. JIA, C. JING, J.X. MENG, S.Y. ZHANG, W.D. HUANG: "Microstructures and Mechanical Properties of Laser Rapid Formed Ti-6Al-4V Alloy", SPIE, PO BOX 10 BELLINGHAM WA 98227-0010 USA, 13 January 2005 (2005-01-13), XP040196221
Attorney, Agent or Firm:
ONSAGERS AS (P. O. Box 1813 Vika, Oslo, N-0123, NO)
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