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Design and development of a high-performance Ni-based superalloy WSU 150 for additive manufacturing

Journal of Materials Science & Technology 2020年第12期47卷 20-28页

作者： Praveen Sreeramagiri ajay bhagavatam Abhishek Ramakrishnan Husam Alrehaili Guru Prasad Dinda Department of Mechanical Engineering Wayne State UniversityDetroitMl48202USA

This research proposes a design and development strategy of a new nickel-based superalloy for additive manufacturing.A new Ni-based superalloy has been developed by the application of the combinatorial alloy development technique coupled with CALPHAD based solidification modeling by effectively suppressing the precipitation *** suppression of precipitation during processing paved a way for prevention of cracks during *** new alloy "WSU 150" revealed excellent room temperature mechanical properties with a yield strength of 867 MPa,an ultimate tensile strength of 1188 MPa,and an elongation of 27.9% in the as-deposited *** mechanical properties of the heat-treated alloy were improved significantly to 1114 MPa yield strength,1396 MPa ultimate tensile strength,and an elongation of 16.1%.Improvement in the mechanical properties is attributed to the additional precipitation and coarsening of γ’ and carbides during *** investigation of the alloy revealed spherical γ’ with a rippled size distribution from the center to the interdendritic *** average size of the γ’ particles in the as-deposited condition was found to be around 48 nm in the interdendritic ***-treatment promoted the coarsening of γ’ which is explained in the paper.

关键词： Ni-based superalloys Additive manufacturing Laser metal deposition Ripple pattern microstructure Alloy development Mechanical properties

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