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- W3204083080 abstract "This investigation focuses on obtaining martensite stainless steel part with uniform mechanical properties along the building direction (BD) by plasma arc direct energy deposition (DED). A tailored 1Cr17Ni2B alloy powder and layer minimum temperature control process were employed. The results revealed that the tensile strengths along BD exhibited a good uniformity with a relative difference less than 1.4 % and the average ultimate tensile strength was 1382 MPa. The high microhardness along the BD also showed a good uniformity, only slightly fluctuated from 542–606 HV0.3 with a periodic length of one concave fish-scale pattern. Then the part along BD was simplified to overlapped concave fish-scale patterns. The microstructure evolution of fish-scale pattern was studied and the result showed that the concave fish-scale pattern was characterized by intragranular lath martensite and intergranular M23(C,B)6+α-Fe eutectic structure. Besides, M2(C,B) particles were distributed on intergranular α-Fe matrix. The layer minimum temperature control of 200︒C process was employed to ensure the eutectic M23(C,B)6 in a concave fish-scale pattern only partly dissolved during the deposition of the next one layer, not during the subsequent layers. It is helpful to deposite concave fish-scale patterns along the BD with similar volume fraction of eutectic M23(C,B)6 and mechanical properties. This investigation discloses a new method to deposite Fe-Cr-C-B alloy part containing intergranular carbides with uniform mechanical properties and high hardness along the BD." @default.
- W3204083080 created "2021-10-11" @default.
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- W3204083080 date "2022-02-01" @default.
- W3204083080 modified "2023-10-05" @default.
- W3204083080 title "Microstructure analysis of martensite stainless steel by directed energy deposition and uniform high hardness" @default.
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- W3204083080 doi "https://doi.org/10.1016/j.jmatprotec.2021.117392" @default.
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