دورية أكاديمية
Fracture behavior of PH15-5 stainless steel manufactured via directed energy deposition
| العنوان: | Fracture behavior of PH15-5 stainless steel manufactured via directed energy deposition |
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| المؤلفون: | Huang, Sheng, Kumar, Punit, Lim, Joel Choon Wee, Radhakrishnan, Jayaraj, Ramamurty, Upadrasta |
| المساهمون: | School of Mechanical and Aerospace Engineering, Singapore Centre for 3D Printing, National Additive Manufacturing Innovation Cluster |
| سنة النشر: | 2023 |
| المجموعة: | DR-NTU (Digital Repository at Nanyang Technological University, Singapore) |
| مصطلحات موضوعية: | Engineering, Mechanical properties, Fatigue behavior |
| الوصف: | The tensile properties, fracture toughness, and fatigue crack growth (FCG) characteristics of a directed energy deposited precipitation hardened stainless steel (grade: PH15-5; age hardening heat treatment condition: H900) were examined. In the as-fabricated condition, the alloy contains microfissures that are oriented parallel to the build direction, whose appearance was difficult to be detected using optical microscopy. Due to their relative orientation w.r.t. the loading direction, significant anisotropy in tensile and FCG behavior was noted, with the properties being particularly lower when the loading direction is perpendicular to the crack orientation. Despite the presence of microfissures, the alloy's fracture initiation toughness is comparable to (or in some cases exceeds) those manufactured using either conventionally techniques or laser powder bed fusion. Activation of the extrinsic toughening mechanisms, such as crack deflection when its mode I direction is perpendicular to the microfissures and a combination of crack bridging and deflection when it is parallel, are the micromechanical reasons for the observed high toughness. The efficacy of such mechanisms is observed to depend on the plastic zone size relative to the microfissure spacing. The understanding developed in this study enables the development of strategies for enhancing the damage tolerance of additively manufactured alloys. ; Agency for Science, Technology and Research (A*STAR) ; National Research Foundation (NRF) ; Published version ; This research is supported by the Agency for Science, Technology and Research (A*STAR) of Singapore via the Structural Metal Alloys Programme (No. A18B1b0061) and the National Research Foundation, Prime Minister’s Office, Singapore under its Medium-Sized Centre funding scheme. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0264-1275 |
| العلاقة: | A18B1b0061; Materials & Design; Huang, S., Kumar, P., Lim, J. C. W., Radhakrishnan, J. & Ramamurty, U. (2023). Fracture behavior of PH15-5 stainless steel manufactured via directed energy deposition. Materials & Design, 235, 112421-. https://dx.doi.org/10.1016/j.matdes.2023.112421Test; https://hdl.handle.net/10356/173900Test; 2-s2.0-85174963186; 235; 112421 |
| DOI: | 10.1016/j.matdes.2023.112421 |
| الإتاحة: | https://doi.org/10.1016/j.matdes.2023.112421Test https://hdl.handle.net/10356/173900Test |
| حقوق: | © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0Test/). |
| رقم الانضمام: | edsbas.7F1AAAF4 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 02641275 |
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| DOI: | 10.1016/j.matdes.2023.112421 |