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Hip-densification of alloy 718 and ati 718Plus®

Joel Andersson (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; F. Vikström ; B. Pettersson
8th International Symposium on Superalloy 718 and Derivatives 2014; Pittsburgh; United States; 28 September 2014 through 1 October 2014 p. 425-435. (2014)
[Konferensbidrag, refereegranskat]

Cast Alloy 718 and ATI 718Plus® have been investigated to disclose their ability to develop Hot Isostatic Pressing (HIP) porosity which may form as a consequence of the casting process. Artificial defects were manufactured in cast Alloy 718 and ATI 718Plus® block and sealed by electron beam welding prior to the HIP treatment which was carried out at three different temperatures, namely; 1120 °C, 1165 °C, and 1190 °C at a pressure of 100 MPa. It was seen that there are no significant difference in the ability to heal pores in between cast Alloy 718 and ATI 718Plus®. No major difference in between the three different temperatures were disclosed whereas the size of the pore seem to have the biggest impact on the ability to heal, which was supported by careful SEM characterization and by simplified calculations considering two different sizes of pores.

Nyckelord: Alloy 718; ATI 718Plus ATI 718Plus®; Hot Isostatic Pressing; Superalloys



Denna post skapades 2015-03-11.
CPL Pubid: 213633

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Ämnesområden

Materialteknik

Chalmers infrastruktur