A Chromium (Cr) containing TiAl intermetallic has been consolidated by Hot Isostatic Pressing (HIP) process using high purity TiAl pre-alloyed powder as original material. Cr has been selected as an element which improves high temperature mechanical properties of HIPed TiAl intermetallic compound. Cr additions in TiAl powder were changed systematically and microstructure and mechanical properties at elevated temperatures were examined. This study determined the densification behavior of Cr containing TiAl intermetallic powder during HIP process conducted at 1273 K under the pressure of 200 MPa. Microstructure of consolidated TiAl + xCr as well as high temperature mechanical properties are presented. Improvement of high temperature tensile strength of as-HIPed TiAl compound was achieved by the effect of Cr particles dispersion and reactive zone formation between Cr particles and TiAl matrix. From these results, it was concluded that tensile strength of HIPed TiAl-5Cr becomes 1.2-1.5 times high than that of HIPed and MIMed TiAl and machinability of TiAl at R.T. also was improved by high elongation of HIPing and Cr addition.
NiAl intermetallics with dispersive Cr particles consolidated by the Hot Isostaic Press (HIP) and Reactive HIP (RHIP) techniques, has been investigated. Mechanical properties of HIPed and RHIPed materials with various Cr concentrations ranging form 0 to 30 mass%Cr, were examined at various temperatures. The consolidation temperature of RHIP materials decreases with Cr addition; when RHIPing NiAl+xCr compounds with 25 mass% has attained remarkable high ductility over 17% elongation and over 400 MPa tensile strength at 873 K. A very high tensile strength of HIPed NiAl+20 mass%Cr over 600 MPa with 10% elongation at 873 K can be achieved at 873 K.
NiAl intermetallics with dispersive Cr particles consolidated by the Hot Isostaic Press(HIP) and Reactive HIP(RHIP) tech niques, has been investigated. Mechanical properties of HIPed and RHIPed materials with various Cr concentrations ranging form 0 to 30 mass÷Cr, were examined at various temperatures. The consolidation temperature of RHIP materials decreases with Cr addition; when RHIPing NiAl{xCr compounds with 25 mass÷ has attained, remarkable high ductility over 17÷ elongation and over 400 MPa tensile strength at 873 K. A very high tensile strength of HIPed NiAl{20 wt.÷Cr about 600 MPa with 10÷ elongation was achieved at 673 K.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.