Friction stir welding is a process that is quite a bit more complex than ordinary arc welding and far more complex than gas flame welding. The result being that it will cost quite a bit more to do it. So ships made with titanium will be exspensive indeed.
The fact that a process can be done in a manner to produce good rsults does not prove that it can be done in a cost-effective manner. So we should wait and watch and see if the process becomes economicly viable.
I believe I saw soemthing on TV about the Airbus A380 using some stir welding processes as well. I don't recall if it was on titanium pieces or Aluminum but it was interesting. The video of the actual process was impressive in how little it affected the workpieces being joined.
It would be interesting to note the limitations of the process as applied now and also to see what is being undertaken to make it more versatile. stir welding a 4 inch thick piece of Titanium hull section would certainly be an impressive feat.
Does anyone have details on this process? What I saw in the video on Airbuss looked like a spinning tool being forced into the intersection of two sheets of materials. As the tool progressed along the interface the rapid spinning created friction to plasticise the metals and it closed up around the tool on the trailing side. It made a very neat and clean looking bond. Presumably full strength.
The Soviets followed up with a robotic system that was able to weld the 4 in thick hull in a single pass. No doubt making the next variant in Titanium a "no brainer".
From the article, I didn't get a sense if the weld joint strength was stronger than/weaker than/or same as the surrounding material. There are obvious manufacturing advantages to this new friction welding, but I wonder how does the resulting material properties of this new process compare to the more traditional methods?
Sorry, but we evloved from using the old heat it up and smash it togther process of welding many decades ago. The current most popular processes use an electrical arc to create a metal puddle, if you will, to melt two metal pieces together. There are several forms of this, Arc welding, TIG and MIG just to name a few. The new process you mentioned in the article is still a very impressive development, however, if it tests out that it indeed has the long term structural integrity needed for ship building.
Ivan, the Soviets were willing to take chances with people's lives in all kinds of situations. It is good to see that a safer process is being developed.
The issue, as the article states, is with the tools. They have to operate in very adverse conditions.
As for the cost, most military systems that would use this technology and material have a very long life time. Just look at the B-52. My father worked on the design of it around the time I was born (and you can see that was a while ago). They are still flying and projected to be around for a long time.
@Ivan: Friction stir welding is a solid-state welding process and doesn't require either fill metal or a shielding gas. So you don't need to wear a space suit in order to do it. It also results in some beneficial microstructural changes which improve material properties. (Sometimes the process is applied to a surface specifically to induce these microstructural changes, rather than to weld one surface to another). It's a very promising process, and it's great to see this collaboration between industry, government, and academia to develop it.
We looked at a number of sources to determine this year's greenest cars, from KBB to automotive trade magazines to environmental organizations. These 14 cars emerged as being great at either stretching fuel or reducing carbon footprint.
Researchers at MIT and Sandia National Labs have observed a reaction in lithium-air batteries that could help improve the design of these cells for electric vehicles and other applications.
Healthcare might seem to be an unlikely target application for the Internet of Things technology, but recent developments show small ways that big-data is going to make an impact on patient care moving into the future.
From Dell / Intel® New Paradigms in Design Work Scott Hamilton, vertical market strategist for Dell Precision workstations, 5/2/2013 3
Early in my career, I worked as a draftsman and remember the days of drawing on vellum with numbered pencils and Mylar with plastic lead. This was a fun experience in the sense that I ...
I've been using workstations for more than 10 years and love finding ways to get more performance from my system. With demanding professional applications that require more power each ...
A lasting memory from my first job as an engineer in an auto assembly plant is standing on hard concrete at six in the morning, vending-machine coffee clutched in hand, listening to ...
A quick look into the merger of two powerhouse 3D printing OEMs and the new leader in rapid prototyping solutions, Stratasys. The industrial revolution is now led by 3D printing and engineers are given the opportunity to fully maximize their design capabilities, reduce their time-to-market and functionally test prototypes cheaper, faster and easier. Bruce Bradshaw, Director of Marketing in North America, will explore the large product offering and variety of materials that will help CAD designers articulate their product design with actual, physical prototypes. This broadcast will dive deep into technical information including application specific stories from real world customers and their experiences with 3D printing. 3D Printing is
To save this item to your list of favorite Design News content so you can find it later in your Profile page, click the "Save It" button next to the item.
If you found this interesting or useful, please use the links to the services below to share it with other readers. You will need a free account with each service to share an item via that service.
Tweet This
3 
