SKM 2023 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 27: Hydrogen in Materials

MM 27.1: Talk

Wednesday, March 29, 2023, 10:15–10:30, SCH A 215

Strain-induced twins and martensite: Effects on hydrogen embrittlement of additive manufactured (AM) 316L — •Stefan Wagner¹, Yuanjian Hong², Chengshuang Zhou², Sabine Schlabach^1,3, Astrid Pundt¹, Lin Zhang⁴, and Jinyang Zheng⁴ — ¹Karlsruhe Institute of Technology (KIT), Institute for Applied Materials - Materials Science and Engineering (IAM-WK), Karlsruhe, Germany — ²Institute of Material Forming and Control Engineering, Zhejiang University of Technology, Hangzhou, China — ³Karlsruhe Nano Micro Facility (KNMFi), KIT-Campus North, Eggenstein-Leopoldshafen, Germany — ⁴Institute of Process Equipment, Zhejiang University, Hangzhou, China

Extending the use of hydrogen as a renewable energy carrier 316L is one of the most important structural materials. Additive manufacturing significantly enhances the steels' strength, allowing for weight reduction of construction parts. In this contribution [1] we investigate effects of strain-induced twins and martensite on hydrogen embrittlement of AM316L under tension in the temperature range from 80 K to 300 K. It is revealed that quasi-cleavage of twin boundaries is the major path of material failure. Strain-induced martensite has low impact on the H-embrittlement of AM316L, since it emerges only late in the deformation process.

[1]: Yuanjian Hong et al., 2022. Corrosion Science, 208; 110669-1-16.