Effect of ruthenium on high-temperature creep rupture life of a single crystal nickel-based superalloy

Atom probe tomography of secondary γ′ precipitation in a single crystal Ni-based superalloy after isothermal aging at 1100°C

“…no grain boundary, large amounts of coherent L1 2 -ordered c 0 precipitates with c matrix, high c 0 solvus and so on, single crystal Ni-based superalloys have superior high temperature creep properties [2,3]. In particular, their mechanical properties were significantly impacted by the morphology, the size-scale, the volume fraction and the distribution of c 0 precipitation, which mainly rely on the alloying compositions and thermal history [4][5][6].The precipitation of c 0 phase has been widely studied in various Ni-based alloys, e.g. Ni-Al-Cr alloys [7][8][9][10][11][12], polycrystalline superalloys [13][14][15][16][17][18], single crystal superalloys [19], etc.…”

Anomalous aging behavior of a Ni–Mo–Cr–Re alloy

“…Re was added to Ni-Co-W-Cr-Al-Ta alloys for improvement of the high temperature properties before. Research has been undertaken to understand the beneficial effects of Re [35][36][37][38][39][40] in such alloys. Earlier work indicated that Re formed clusters or segregated at the interfaces between the precipitates and the matrix.…”

Studying the effect of Ruthenium on High Temperature Mechanical Properties of Nickel Based Superalloys and Determining the Universal Behavior of Ruthenium at Atomic Scale with respect to alloying elements, Stress and Temperature

“…Ruthenium helps in producing a microstructure with smaller and more regular γ' and denser dislocation structure at γ/ γ' interface (Pyczak et al 2009, Tan et al 2011). …”

“…Ruthenium suppresses or at least doesn't affect the tendency of the alloy to form topologically closed pack phases (TCP), (Sato et al 2006, Tan et al 2011, Tsuno et al 2008 …”

“…It promotes square dislocation networks and change of γ/γ' misfit which is beneficial to the mechanical properties of superalloys (Tan et al 2011). …”