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Rapid solidification of 17-7 PH stainless steel: Heat treatment response

DSpace at IIT Bombay

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Title Rapid solidification of 17-7 PH stainless steel: Heat treatment response
 
Creator BHARGAVA, AK
TIWARI, AN
 
Description Commercial grade 17-7 PH stainless steel has been rapidly solidified (RS) by chill block melt spinning to result in an improvement in Vickers microhardness by 88 per cent, refinement in grain size by a factor of 9 and a significant suppression in delta-ferrite and carbide phases as compared to conventionally processed (CP) 17-7 PH steel. In order to study heat treatment response three different routes of hardening heat treatments were applied to RS 17-7 PH steel ribbons. These were (i) direct isochronal ageing, (ii) conventional double hardening treatment and (iii) direct conditioning coupled with isochronal ageing. Conventionally peak aged (PA) melt spun ribbons were found to be (a) 46 per cent harder than CP 17-7 PH steel after identical heat treatment and (6) 43 per cent harder than direct isochronally PA (at 973 degrees K) ribbons. Direct isochronally PA 17-7 PH steel ribbons showed a precipitation of M(23)C(16) predominantly at grain boundaries with a plate like morphology (plates 140 to 300 nm long and 70 to 140 nm wide).
 
Publisher A B ACADEMIC PUBL
 
Date 2011-07-12T11:34:30Z
2011-12-26T12:48:51Z
2011-12-27T05:34:08Z
2011-07-12T11:34:30Z
2011-12-26T12:48:51Z
2011-12-27T05:34:08Z
1996
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF RAPID SOLIDIFICATION, 9(2), 121-136
0265-0916
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3311
http://hdl.handle.net/10054/3311
 
Language en