Synthesis and Characterization of 17 Cr …
293
Fig. 7 The hardness of Hot
pressed alloy A and alloy B
4 Conclusions
Two different ferritic ODS steel such as alloy A (430L + 0.3Y 2 O 3 + 0.5ZrO 2 +
0.1Ti) wt%, alloy B (430L + 0.3Y 2 O 3 + 0.5ZrO 2 + 0.1Ti + 4Al) wt% were fabricated through the MA using vacuum hot pressing. The summarized results are the
following:
1. From the XRD analysis nanocrystalline size of 3.6 nm, and 6 nm were obtained
at 20 h of milling for alloy A, B, respectively.
2. The highest hot-pressed density of 7.60 g/cc (99% theoretical density) alloy A
(aluminium-free) ferritic ODS steel higher density were obtained than the alloy
B 7.34 g/cc pressure at 60 MPa.
3. Microstructures of alloy A, alloy B containing ferrite along with complex
oxides such as (Y–Zr–Ti–O), (Y–Zr–Ti–Al–O) which is evident from TEM-EDS
analysis.
4. Alloy A has a higher hardness of 870 VHN were obtained than the alloy B (764
VHN), alloy A higher hardness was observed due to ultrafine grains, whereas
alloy B reduction in hardness with the addition of aluminium coarse grains was
observed.
References
1. Schroeder H, Ullmaier H (1991) Helium and hydrogen effects on the embrittlement of iron-and
nickel-based alloys. J Nuclear Mater 179:118–124
2. Klueh RL, Ehrlich K, Abe F (1992) Ferritic/martensitic steels: promises and problems. J Nuclear
Mater 191:116–124
3. Kim HY, Kwon OY, Jang J, Hong SH (2006) Modification of anisotropic mechanical properties
in recrystallized oxide dispersion strengthened ferritic alloy. Scripta Mater 54(9):1703–1707
293
Fig. 7 The hardness of Hot
pressed alloy A and alloy B
4 Conclusions
Two different ferritic ODS steel such as alloy A (430L + 0.3Y 2 O 3 + 0.5ZrO 2 +
0.1Ti) wt%, alloy B (430L + 0.3Y 2 O 3 + 0.5ZrO 2 + 0.1Ti + 4Al) wt% were fabricated through the MA using vacuum hot pressing. The summarized results are the
following:
1. From the XRD analysis nanocrystalline size of 3.6 nm, and 6 nm were obtained
at 20 h of milling for alloy A, B, respectively.
2. The highest hot-pressed density of 7.60 g/cc (99% theoretical density) alloy A
(aluminium-free) ferritic ODS steel higher density were obtained than the alloy
B 7.34 g/cc pressure at 60 MPa.
3. Microstructures of alloy A, alloy B containing ferrite along with complex
oxides such as (Y–Zr–Ti–O), (Y–Zr–Ti–Al–O) which is evident from TEM-EDS
analysis.
4. Alloy A has a higher hardness of 870 VHN were obtained than the alloy B (764
VHN), alloy A higher hardness was observed due to ultrafine grains, whereas
alloy B reduction in hardness with the addition of aluminium coarse grains was
observed.
References
1. Schroeder H, Ullmaier H (1991) Helium and hydrogen effects on the embrittlement of iron-and
nickel-based alloys. J Nuclear Mater 179:118–124
2. Klueh RL, Ehrlich K, Abe F (1992) Ferritic/martensitic steels: promises and problems. J Nuclear
Mater 191:116–124
3. Kim HY, Kwon OY, Jang J, Hong SH (2006) Modification of anisotropic mechanical properties
in recrystallized oxide dispersion strengthened ferritic alloy. Scripta Mater 54(9):1703–1707