Engineered microstructure evolution in inconel 718 via laser powder bed fusion through a novel element-based approach

• Engineered microstructure enables localised control in mechanical properties within a single material. In this research, a novel element-based approach is proposed to engineer the microstructure by varying the laser power and scan speed in laser powder bed fusion (L-PBF) process. A sample containing 25 elements were printed at different laser power and scan speed values and the resultant microstructure exhibited that the textured grains increase with laser energy density (LED). Subsequently, the measured hardness of the element printed at highest LED was approximately 14 % higher than the element printed at lowest LED. Current research is a proof of concept for the element-based approach to engineer the microstructure through L-PBF technique which can be extended to the component level by correlating the microstructure with element position and laser parameters.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Tribologi (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Tribology (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)

Nyckelord

Hardness

Laser energy density

Microstructure

Texture

Additive manufacturing

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art (ämneskategori)

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