000			02164nam a22002297a 4500
008			230619b |||||||| |||| 00| 0 eng d
041			_aen.
082			_a620 _bDIV
100			_aBandla, Divya Sri
245			_aOn the creep behaviour of Ni based solid solution alloys from binary to quaternary
260			_aBangalore _bIISc _c2023
300			_axv, 93p. _bcol. ill. ; _c29.1 cm * 20.5 cm _eeThesis _g6.827Mb
500			_ainclude bibliographic reference and index
502			_aPhD; 2023; Materials engineering
520			_aOn the creep behavior of Ni based solid solution alloys from binary to quaternary A power-law relationship between the steady state strain rate (𝜀̇) and imposed stress (σ) is well established so that the 𝜀̇∝𝜎^𝑛, at a fixed temperature, where n is termed the stress exponent. Additional microstructural terms influencing creep such as the grain size and stacking fault energy (γ) have been incorporated into the creep equation in a power-law form, such as 𝜀̇∝𝛾^𝑞. In the case of an intragranular dislocation climb controlled creep in a solid solution alloy, the creep rate has been expressed as 𝜀̇∝𝐷𝜎^5𝛾^3, where D is the appropriate diffusion coefficient, n~5 and q~3. However, an evaluation of the earlier creep data suggests that while q~3 is reasonable for pure metals, there is considerable uncertainty in the value of q for solid solution alloys. The current study focuses on characterizing the creep behavior and the value of q for Ni – xCo alloys, with x = 10, 33, and 60, where the addition of Co reduces the stacking fault energy. Following creep in Ni-Co alloys, the creep behaviour of CSSAs NiCoCr and NiCoCrFe was also investigated to probe potential changes in the creep mechanisms with the addition of alloying element. All alloys are single phase solid solutions with a face-centered cubic (f.c.c.) crystal structure. Prior to the creep, all alloys had a grain size d~100 μm.
650			_acreep behavior
650			_aNickel
650			_aNiCoCrFe alloys
700			_aChokshi, Atul H advised
856			_uhttps://etd.iisc.ac.in/handle/2005/6131
942			_cT
999			_c429521 _d429521