{"id":29,"date":"2018-04-19T11:15:40","date_gmt":"2018-04-19T16:15:40","guid":{"rendered":"https:\/\/my.vanderbilt.edu\/vuwal\/?page_id=29"},"modified":"2018-06-05T14:27:16","modified_gmt":"2018-06-05T19:27:16","slug":"friction-stir-welding-of-meteorite","status":"publish","type":"page","link":"https:\/\/my.vanderbilt.edu\/vuwal\/research\/friction-stir-welding-of-meteorite\/","title":{"rendered":"Friction Stir Welding of Meteorite"},"content":{"rendered":"<p>Space has begun to open up to private companies for exploration and exploitation.<br \/>\nThis could include mining operations, manufacturing, and colonization. For these<br \/>\nlong-term space operations, materials will either have to be sent from earth or<br \/>\nscavenged along the way. Lifting materials out of Earth\u2019s gravity well is extremely<br \/>\nexpensive. So, being able to gather and utilize materials such as the metallic<br \/>\ncompounds in asteroids could greatly increase the feasibility of the space<br \/>\noperations.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-254\" src=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/2814\/2018\/04\/SecondMeteorite.jpg\" alt=\"SecondMeteorite\" width=\"600\" \/><br \/>\n<img decoding=\"async\" class=\"aligncenter size-full wp-image-242\" src=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/2814\/2018\/04\/Meteoritepreparedsample.jpg\" alt=\"Meteoritepreparedsample\" width=\"600\" \/><br \/>\n<img decoding=\"async\" class=\"aligncenter size-full wp-image-241\" src=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/2814\/2018\/04\/MeteoriteCanyonDiablo.jpg\" alt=\"MeteoriteCanyonDiablo\" width=\"600\" \/>Meteorites have proven difficult to weld due to the presence of phosphorous,<br \/>\ncarbon, and sulfur as well as non-metallic inclusions. These elements when melted<br \/>\nin the iron tend to create solidification cracking and variable hardness across the<br \/>\nweld.<sup>1<\/sup>.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-201\" src=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/2814\/2018\/04\/02_50x_hardness_first_etch_below_SZ.jpg\" alt=\"02_50x_hardness_first_etch_below_SZ\" width=\"600\" \/><br \/>\n<img decoding=\"async\" class=\"aligncenter size-full wp-image-261\" src=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/2814\/2018\/04\/SuccessfulWeld.jpg\" alt=\"SuccessfulWeld\" width=\"600\" \/>Friction Stir Welding(FSW) techniques are a good candidate for in space operation because<br \/>\nit does not depend on gravity and is safer due to lower temperatures with no risk of<br \/>\nignition or arcing. FSW relies on plasticizing the materials rather than melting it,<br \/>\nso the presence of other elements and inclusions have less of an impact on the overall<br \/>\nstrength of the weld. Demonstrating and optimizing FSW and FSSW on meteorites would<br \/>\ndemonstrate the possibility of in-space construction of needed parts and structures from<br \/>\nasteroids without the need for preprocessing the material.<\/p>\n<p>Bibliography<\/p>\n<p>1. Elmer JW, Evans CL, Embree JJ, Gallegos GF, Summers LT. Electron beam weldability of a group IAB iron meteorite. Sci Technol Weld Join 2014;000:1362171813Y.000.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Space has begun to open up to private companies for exploration and exploitation. This could include mining operations, manufacturing, and colonization. For these long-term space operations, materials will either have to be sent from earth or scavenged along the way. Lifting materials out of Earth\u2019s gravity well is extremely expensive. So, being able to gather&#8230;<\/p>\n","protected":false},"author":7503,"featured_media":0,"parent":17,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"tags":[],"class_list":["post-29","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/pages\/29","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/users\/7503"}],"replies":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/comments?post=29"}],"version-history":[{"count":3,"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/pages\/29\/revisions"}],"predecessor-version":[{"id":310,"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/pages\/29\/revisions\/310"}],"up":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/pages\/17"}],"wp:attachment":[{"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/media?parent=29"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/vuwal\/wp-json\/wp\/v2\/tags?post=29"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}