Thanks for the linkn, but the past will not be the future
If and when NASA ever announces either Mars sample return or manned flight, you can expect professionals outside NASA to actually spend their time on this. Thus the future will be much different than the past.
My guesses are that while explosive welding will work for a sample return, the requirements that will be imposed by them before any manned flight are likely to be so severe as to prohibit it.
Sorry, but that's the facts. Now don't everyone throw their tantrums all at once -
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