This is the kind of stuff I was referring to earlier when it comes to interviews. Wouldn't everyone have been served better by NOT flying you out there first? Couldn't they have accomplished the same thing by looking at your resume first, and maybe picking up the phone?bingo. As an EE PhD, I know that the exact specialization of your grad work really matters for PhD level positions. I was once flown out to a company for an interview, and found that only their computational electromagnetics group was interviewing me. With minimal coursework and no research background in that exact specialization (I was in plasma physics) they were not interested at all - the manager all but told me that to my face after she perused my resume in front of me.
This also aligns with my experiences. I'm also from plasma physics. For the most part, companies don't seem to have a need for anyone from that specialty. Material scientists? Yes. Know how to use a SEM/TEM? Yes. Know how to do something that might be useful to them, but takes more than a sentence or two to explain? Not so much.