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On The Effect Of Silicon And Phosphorus During The Precipitation Of Κ-Carbide In Fe-Mn-Al-C Alloys, Laura Bartlett
On The Effect Of Silicon And Phosphorus During The Precipitation Of Κ-Carbide In Fe-Mn-Al-C Alloys, Laura Bartlett
Doctoral Dissertations
"Implementation of lightweight high manganese and aluminum steels for use in high energy absorbing applications requires a detailed knowledge of how alloying additions and impurities affect age hardening and high strain rate fracture properties. Dynamic fracture toughness is an important design criterion but has not been reported previously in these alloys. In addition, previous studies have shown that silicon and phosphorus increased the strength and aged hardness; however, the mechanism was unknown. This research mainly focuses on the effect of silicon and phosphorus on the precipitation of Κ-carbide and alloy partitioning during aging. Short range ordering, SRO, of Fe-Al-C into …
Role Of Alloy Additions On Strengthening In 17-4 Ph Stainless Steel, Arpana S. Murthy
Role Of Alloy Additions On Strengthening In 17-4 Ph Stainless Steel, Arpana S. Murthy
Doctoral Dissertations
"Alloy modifications by addition of niobium (Nb ), vanadium (V), nitrogen (N) and cobalt (Co) to cast 17-4 PH steel were investigated to determine the effect on mechanical properties. Additions of Nb, V, and N increased the yield strength from 1120 MPa to 1310 MPa while decreased the room temperature charpy V notch (CVN) toughness from 20 J to four Joules. The addition of Co to cast 17-4 PH steel enhanced the yield strength and CVN toughness from 1140 MPa to 1290 MPa and from 3.7 J to 5.5 J, respectively. In the base 17-4 PH steel, an increase in …