What question did this study set out to answer?

To investigate the microstructural evolution and mechanical performance of additively manufactured duplex stainless steel grades 2205, 2209, and 2509 during solution annealing.

November 26, 2024Metallurgical and Materials Transactions AOpen Access

Microstructure Development in Duplex Stainless Steels from Additive Manufacturing with Coaxial Directed Energy Deposition and Heat Treatment

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Authors

THTrond Arne Hassel LMLene Anita Marken SASiri Marthe Arbo

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Overview

Experimental study demonstrates improved toughness and phase balance in additively manufactured duplex stainless steels after solution annealing, highlighting pathways to eliminate brittle phases.

Key Points

To investigate the microstructural evolution and mechanical performance of additively manufactured duplex stainless steel grades 2205, 2209, and 2509 during solution annealing.
Fabricated specimens from duplex stainless steel grades 2205, 2209, and 2509 using wire-fed coaxial directed energy deposition.
Conducted post-build solution annealing at temperatures between 1020 and 1170 °C and compared microstructures with thermodynamic equilibrium calculations.
Evaluated phase morphology, hardness, and Charpy impact toughness on as-built and heat-treated grade 2209 samples.
Grades 2209 and 2509 achieved more homogeneous microstructures with higher austenite fractions as-built than 2205, but required higher annealing temperatures than conventional duplex alloys to suppress sigma phase precipitation.
Post-deposition heat treatment significantly enhanced the Charpy impact toughness of grade 2209 compared to its as-built condition.
Optimized heat treatment prevented detrimental phase precipitation while maintaining controlled grain growth and yielding a fine-grained, slightly spheroidized Widmanstätten austenite morphology.

Cite This Study

Hassel et al. (2024) studied this question.

synapsesocial.com/papers/69d8fd5ea5ecc596b5d18f80 https://doi.org/10.1007/s11661-024-07560-z

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November 26, 2024Metallurgical and Materials Transactions AOpen Access

Microstructure Development in Duplex Stainless Steels from Additive Manufacturing with Coaxial Directed Energy Deposition and Heat Treatment

View Full Paper

Ask AI

Bookmark

Authors

THTrond Arne Hassel LMLene Anita Marken SASiri Marthe Arbo

Discussion

Member takes

Overview

Experimental study demonstrates improved toughness and phase balance in additively manufactured duplex stainless steels after solution annealing, highlighting pathways to eliminate brittle phases.

Key Points

To investigate the microstructural evolution and mechanical performance of additively manufactured duplex stainless steel grades 2205, 2209, and 2509 during solution annealing.
Fabricated specimens from duplex stainless steel grades 2205, 2209, and 2509 using wire-fed coaxial directed energy deposition.
Conducted post-build solution annealing at temperatures between 1020 and 1170 °C and compared microstructures with thermodynamic equilibrium calculations.
Evaluated phase morphology, hardness, and Charpy impact toughness on as-built and heat-treated grade 2209 samples.
Grades 2209 and 2509 achieved more homogeneous microstructures with higher austenite fractions as-built than 2205, but required higher annealing temperatures than conventional duplex alloys to suppress sigma phase precipitation.
Post-deposition heat treatment significantly enhanced the Charpy impact toughness of grade 2209 compared to its as-built condition.
Optimized heat treatment prevented detrimental phase precipitation while maintaining controlled grain growth and yielding a fine-grained, slightly spheroidized Widmanstätten austenite morphology.

Cite This Study

Hassel et al. (2024) studied this question.

synapsesocial.com/papers/69d8fd5ea5ecc596b5d18f80 https://doi.org/10.1007/s11661-024-07560-z

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