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Oxide dispersion strengthened
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In this paper, a feasibility study concerning the generation of tensile specimens using a quenching dilatometer is presented. The ODS steel investigated contains 9%Cr and exhibits a phase transformation between ferrite and austenite around 870 °C.
8p
christabelhuynh
30-05-2020
31
1
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The surface modification of engineering materials by laser beam scanning (LBS) allows the improvement of properties in terms of reduced wear, increased corrosion resistance, and better strength. In this study, the laser beam scan method was applied to produce an oxide dispersion strengthened (ODS) structure on a zirconium metal surface. A recrystallized Zircaloy-4 alloy sheet with a thickness of 2 mm, and Y2O3 particles of 10 μm were selected for ODS treatment using LBS.
8p
minhxaminhyeu5
30-06-2019
20
0
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The grain size and martensitic lath width become smaller with the increase in a cooling rate. The carbides were precipitated at the grain boundaries formed between the ferrite and martensite phases and at the martensitic lath interfaces. In addition, the carbide precipitates become smaller and more widely dispersed with the increase in a cooling rate, resulting in that the faster cooling rate generated the higher hardness of the ODS steel.
8p
minhxaminhyeu3
12-06-2019
9
1
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The mechanical strength of Zircaloy-4 increased with the formation of the ODS layer. The ring-tensile strength of Zircaloy-4 increased from 790 to 870 MPa at room temperature, from 500 to 575 MPa at 380C, and from 385 to 470 MPa at 500C. Strengthening became more effective as the test temperature increased. It was noted that brittle fracture occurred at room temperature, which was not observed at elevated temperatures.
5p
minhxaminhyeu3
25-06-2019
12
1
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(bq) part 2 book "welding metallurgy and weldability of nickel-base alloys" has contents: oxide dispersion strengthened alloys and nickel aluminides, repair welding of ni base alloys, dissimilar welding, dissimilar welding.
186p
bautroibinhyen19
27-02-2017
59
6
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