ME355 Winter 2015 Hw#7 Due: Wednesday, March 11, 2015 Part A. Study guide for the Joining Processes (No need to turn in)

Review the lecture notes and textbook on the Joining Processes, be able to answer the following questions:

1. Fundamental difference between fusion welding and solid state welding. List

at least 3 subcategories each in fusion welding and solid state welding and be able to describe their working principles, advantage and disadvantages (at least one of each).

2. Common defects seen in fusion welded joints.

3. Difference between soldering and brazing.

4. Finish watching all the youtube videos posted on the lecture page on Joining

processes: http://courses.washington.edu/me355b/lectures.html

Part B. We will have a guest lecture on Wednesday, March 4 on Titanium Manufacturing Technology at Boeing. Please attend the guest lecture, and write and submit a summary (one page) based on the lecture. Please try to include the following information in your summary:

1. How much titanium is used in the Boeing airplanes like Boeing 787? 2. Why (benefits, functions) and where are they used? 3. What are the challenges for machining titanium? 4. What are the manufacturing techniques used for Titanium at Boeing? 5. What are the joining techniques used for the titanium structures and the

pros and cons of these techniques?