The substrate consists of a metal or {HEAD ~ an alloy} mainly composed of Ni or {TAIL ~ Al}, or stainless steel 
mainly composed of
The substrate consists of a metal or { HEAD ~ an alloy } mainly composed of Ni or { TAIL ~ Al } , or stainless steel
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH