Tube coupling

A tube assembly comprising:

• a first tube;
• a second tube;
• and
• a tube coupling for coupling the first tube and the second tube, the tube coupling comprising:
• (a) an inner shroud located circumferentially around a first tube distal end at an inner shroud distal end, the inner shroud distal end having one or more radial teeth;
• (b) an outer shroud having a first outer shroud distal end and a second outer shroud distal end, the first outer shroud distal end located circumferentially around a second tube distal end and the second outer shroud distal end located circumferentially around the inner shroud distal end;
• and
• (c) a band configured to elastically compress the second outer shroud distal end onto the inner shroud distal end, the band formed of a shape memory alloy, wherein the band elastically compresses the second outer shroud distal end and the inner shroud distal end such that the one or more radial teeth are swaged into an outer surface of the first tub e.