FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2885655910> ?p ?o ?g. }

• W2885655910 abstract "Lean maraging steels were designed for several application sectors by providing very high strength and ductility, with the addition of relatively cheaper elements like manganese. In this work, the microstructural and mechanical properties of four niobium-containing (0.035 wt. %) and vanadium-containing (0.02 wt. %) Fe-7Mn-2Ni-1Ti-1Mo-0.03C (in wt. %) with different content of aluminium (1~2 wt. %) aged at different temperatures between 420 °C and 570 °C were investigated. As-quenched Fe-7Mn alloys exhibited a good combination of high strength (~700 MPa of 0.2 proof strength, ~ 850 MPa of UTS) and ductility (~ 10 % tensile elongation). The as-quenched microstructure consisted of lath martensite and a small amount (~ 0.3 vol. %) of micronsized (Ti, Mo, Nb/V)C carbides. The aging process significantly strengthened/hardened the Fe-7Mn alloys which is due to the formation of nano-sized Nix(Ti, Mn, Al) precipitates. Nix(Ti, Mn, Al) precipitates exhibit a very high number density (52.9×1014/m2 in the peak-aged state of Alloy 2, aged at 500 °C for 24 h) and fine size (average diameter was 17.4 ± 4.2 nm after aged at 500 °C for 168 h). The Vickers hardness increased with aging time in the under-aged stage which was due to the precipitate growth and the alloy was strengthened by Orowan bypassing mechanism. The hardness decreased with aging time after the peak hardness as the precipitate coarsened. There were two types of the crystal structure observed for Nix(Ti, Mn, Al) precipitates: The L21-Ni2(Ti, Mn, Al) phase (lattice parameter, a = 0.5863 ~ 0.5895 nm, which is co-planar with martensite matrix, with only 1.72 % of lattice misfit. And the L12-Ni3(Ti, Mn, Al) structure ( a = 0.3598 ~ 0.3613 nm). A short time-aging resulted in a yield strength above 1 GPa but led to embrittlement of Fe-7Mn alloys, which was believed to be due to the segregation of Mn to the grain boundaries. Both carbides and nano-precipitates formed along grain boundaries were likely to reduce the cohesion across the boundary plane, as well as resulted in stress-strain incompatibilities. However, the prolonged aging resulted in the formation of reverted austenite (RA) in the over-aged stage, which led to the recovery of ductility when aged at 570 °C as the austenite reversion removed the Mn solute from the grain boundaries. Reverted austenite exhibited lath-like shape with the length between 50 and 2000 nm. Both the size and volume fraction of RA increased with the increasing aging time and aging temperature. RA was formed with the diffusion-controlled mechanism, and it was observed exhibiting a Kurdjumov-Sachs (K-S) orientation relationship with the neighbouring aged martensite grains with an enrichment of Mn and Ni. Higher content of Al addition resulted in ~ 25 vol. % of δ-ferrite in the as-quenched microstructure, which was stable during aging. 2 wt. % of Al also resulted in higher volume fraction of nano-precipitates and increased the dissolution temperature of precipitates, however, it delayed the peak-aging time and austenite reversion. Nb-containing alloys exhibited relatively finer size of prior austenite grains and (Ti, Mo, V)C carbides, larger size and higher number density of Ni(Ti, Mn, Al) precipitates, but slightly lower austenite fraction, compared to V-containing alloys. Based on the results, it is suggested that Alloy 3 aged at 570 °C for 2~6 h gives the optimized mechanical properties." @default.
• W2885655910 created "2018-08-22" @default.
• W2885655910 creator A5044317097 @default.
• W2885655910 date "2017-12-21" @default.
• W2885655910 modified "2023-09-24" @default.
• W2885655910 title "Development of Lean Maraging Steels for Ultra high Strength Applications" @default.
• W2885655910 hasPublicationYear "2017" @default.
• W2885655910 type Work @default.
• W2885655910 sameAs 2885655910 @default.
• W2885655910 citedByCount "0" @default.
• W2885655910 crossrefType "dissertation" @default.
• W2885655910 hasAuthorship W2885655910A5044317097 @default.
• W2885655910 hasConcept C112950240 @default.
• W2885655910 hasConcept C149912024 @default.
• W2885655910 hasConcept C18747287 @default.
• W2885655910 hasConcept C191897082 @default.
• W2885655910 hasConcept C192562407 @default.
• W2885655910 hasConcept C2776512210 @default.
• W2885655910 hasConcept C2780026712 @default.
• W2885655910 hasConcept C2780430920 @default.
• W2885655910 hasConcept C33947775 @default.
• W2885655910 hasConcept C504678139 @default.
• W2885655910 hasConcept C87976508 @default.
• W2885655910 hasConceptScore W2885655910C112950240 @default.
• W2885655910 hasConceptScore W2885655910C149912024 @default.
• W2885655910 hasConceptScore W2885655910C18747287 @default.
• W2885655910 hasConceptScore W2885655910C191897082 @default.
• W2885655910 hasConceptScore W2885655910C192562407 @default.
• W2885655910 hasConceptScore W2885655910C2776512210 @default.
• W2885655910 hasConceptScore W2885655910C2780026712 @default.
• W2885655910 hasConceptScore W2885655910C2780430920 @default.
• W2885655910 hasConceptScore W2885655910C33947775 @default.
• W2885655910 hasConceptScore W2885655910C504678139 @default.
• W2885655910 hasConceptScore W2885655910C87976508 @default.
• W2885655910 hasLocation W28856559101 @default.
• W2885655910 hasOpenAccess W2885655910 @default.
• W2885655910 hasPrimaryLocation W28856559101 @default.
• W2885655910 hasRelatedWork W1904093508 @default.
• W2885655910 hasRelatedWork W1987129420 @default.
• W2885655910 hasRelatedWork W2000460637 @default.
• W2885655910 hasRelatedWork W2009160743 @default.
• W2885655910 hasRelatedWork W2062896117 @default.
• W2885655910 hasRelatedWork W2065322415 @default.
• W2885655910 hasRelatedWork W2503664759 @default.
• W2885655910 hasRelatedWork W2549485039 @default.
• W2885655910 hasRelatedWork W2886217973 @default.
• W2885655910 hasRelatedWork W2891101534 @default.
• W2885655910 hasRelatedWork W2906844428 @default.
• W2885655910 hasRelatedWork W2907000282 @default.
• W2885655910 hasRelatedWork W2971867711 @default.
• W2885655910 hasRelatedWork W3015935214 @default.
• W2885655910 hasRelatedWork W3036145276 @default.
• W2885655910 hasRelatedWork W3045675748 @default.
• W2885655910 hasRelatedWork W3115265263 @default.
• W2885655910 hasRelatedWork W3162531855 @default.
• W2885655910 hasRelatedWork W3165935298 @default.
• W2885655910 hasRelatedWork W3167651177 @default.
• W2885655910 isParatext "false" @default.
• W2885655910 isRetracted "false" @default.
• W2885655910 magId "2885655910" @default.
• W2885655910 workType "dissertation" @default.