Have a look at these! ;)

http://www.msm.cam.ac.uk/phase-trans/2000/phd.html

You could also get some ideas from here as well:

http://cst-www.nrl.navy.mil/lattice/

Here are some tools you can use in writing your thesis:

http://aluminium.matter.org.uk/content/html/eng/default.asp?catid=&pageid=1

http://aluminium.matter.org.uk/aluselect/default.asp

http://www.matter.org.uk/diffraction/

http://www.matter.org.uk/glossary/

http://www.matter.org.uk/solidification/

http://www.matter.org.uk/steelmatter/

http://www.steeluniversity.org/content/html/eng/default.asp?catid=1&pageid=1016899460

http://www.matter.org.uk/stereography/

http://www.matter.org.uk/tem/

http://www.matter.org.uk/authors.htm

http://www.matter.org.uk/links.htm

http://ci.nii.ac.jp/cinii/servlet/DirTop?lang=en

http://www.engineersedge.com/engineering-analysis.htm

http://www.engineersedge.com/engineering/Engineering_Downloads/Engineering_Forms_Documents/

http://www.engineersedge.com/applications-design.htm

http://www.engineersedge.com/definitions.htm

http://www.engineersedge.com/mathematics_menu.shtml

http://www.engineersedge.com/calculators.htm

http://www.bnl.gov/RHIC/

http://cdsweb.cern.ch/record/1177862

https://lasers.llnl.gov/

http://www.iter.org/mach/Pages/Tokamak.aspx

http://irfu.cea.fr/en/

http://bunter.msm.cam.ac.uk/phase-trans/2006/Kemp.thesis.pdf

http://www.hrsgdesign.com/design0.htm

http://sciencelinks.jp/component/option,com_sljlinks/Itemid,222/

http://www.msm.cam.ac.uk/phase-trans/movies.html

http://www.constructalia.com/en_EN/index.jsp

THis one isn't free, but the subscription is reasonable:

http://www.knovel.com/web/portal/browse/display?_EXT_KNOVEL_DISPLAY_bookid=776

http://watch.mit.edu/

http://ocw.mit.edu/OcwWeb/web/home/home/index.htm

https://engineering.purdue.edu/ME/

http://www.mrs.org/s_mrs/sec_subscribe.asp?CID=2986&DID=131688

http://www.engr.sjsu.edu/WofMatE/Metals&Alloys.htm

http://www.nidi.org/index.cfm/ci_id/10/la_id/1.htm

http://www.worldstainless.org/

http://www.euro-inox.org/

http://sti.srs.gov/fulltext/ms9800869/ms9800869.html

http://www.psc.edu/science/Olson/Olson.html#one

http://www.psc.edu/science/Olson/Olson-cracks.html

http://www.psc.edu/science/Olson/Olson-quench.html

https://qir.kyushu-u.ac.jp/dspace/handle/2324/12825

https://engineering.purdue.edu/BTPFL/

http://www.aluminum.org/index.htm

http://www.alcotec.com/

http://weldinghistory.org/

http://www.ssina.com/publications/sssa.html

http://www.worldstainless.org/About+stainless/The+SS+Library.htm

There's more, but I'm going to eat dinner now so this should do for now! ;)

Of course, you also have the subjects of: welding involved in various fusion energy projects such as CERN, NIL and K-Star in South Korea along with the future ITER project as well, welding technologies used in developing wind and solar energy and clean coal technology projects, welding components together for the fabrication of carbon sequestration facilities, advances in aerospace materials and joining methods, etc.,welding advanced structural materials, welding consumables developments, advanced welding processes, hybrid welding and joining processes, Post Weld Heat Treatment procedures for advanced ferrous & non-ferrous metals, etc...

There are more topics that you can choose from besides these,and you are only limited by your imagination as well as the current research out there! ;) I hope this will give you somewhere to start thinking on your own!!! :) :) :) P.S. I almost forgot about this one:

http://www.materials.ac.uk/search/result.asp?look=steel&hi=-1&acdb=tres

Respectfully,
Henry