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Expanding the Portfolio of Additive Manufacturing Capabilities Through Advanced Processing Techniques
Expanding the Portfolio of Additive Manufacturing Capabilities Through Advanced Processing Techniques
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152034
- ISBN
- 9798384049227
- DDC
- 621
- 저자명
- Tian, Chenxi.
- 서명/저자
- Expanding the Portfolio of Additive Manufacturing Capabilities Through Advanced Processing Techniques
- 발행사항
- [Sl] : Cornell University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 146 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: Moridi, Atieh.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2024.
- 초록/해제
- 요약The rapidly developing additive manufacturing (AM) enables the fabrication of complex geometries that were previously considered infeasible . However, the highly localized energy input and rapid thermal cycles seen in beam-based metal AM are common causes of solidification cracking and anisotropic mechanical properties. Various studies have shown approaches to address the processing defects and material anisotropy in powder-based AM, such as creating AM-specific alloy materials or decorating the feedstock powder with grain modifiers. These solutions can be economically burdensome and do not fully leverage the in-situ material formation in AM. My work aims to expand the portfolio of AM capabilities through in-situ reactive printing (IRP). This advanced processing technique forms material with chemical reactions triggered by localized energy input and rigorous thermal-driven mixing during AM material solidification.In chapters two and three, I discuss the IRP of metal matrix composite focusing on the binary material system of aluminum (Al) and titanium (Ti). I begin with a feasibility study of IRP by fabricating in-situ TiAl3-reinforced aluminum matrix composites (AMC). It demonstrates improved processibility of AM aluminum and shows the capability of IRP to create compositional tunability with an extended ceiling of AMC intermetallic volume fraction. I further optimize the microstructure for enhanced tunable tensile properties and discuss the dual functions of the in-situ formed TiAl3 reinforcement phase: load transfer strengthening and grain refinement by providing heterogeneous nucleation sites.Extending the application of IRP, I fabricate porous metal and explain a post-process framework created to automate the collection of pore statistics from high-speed X-ray image sequences of operando synchrotron experiments elucidating the dynamic process of pore formation. Discussions on the effects of foaming agent type, content, and different processing parameters on porosity characteristics are presented in the fourth chapter. The findings shed light on AM enabling the fabrication of free-form porous metal structures and guide design choices for future AM porous metals.
- 일반주제명
- Mechanical engineering
- 일반주제명
- Engineering
- 일반주제명
- Materials science
- 키워드
- Porous metal
- 기타저자
- Cornell University Mechanical Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152034
■006m o d
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■020 ▼a9798384049227
■035 ▼a(MiAaPQ)AAI31334948
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a621
■1001 ▼aTian, Chenxi.▼0(orcid)0000-0001-5411-137X
■24510▼aExpanding the Portfolio of Additive Manufacturing Capabilities Through Advanced Processing Techniques
■260 ▼a[Sl]▼bCornell University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a146 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: Moridi, Atieh.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2024.
■520 ▼aThe rapidly developing additive manufacturing (AM) enables the fabrication of complex geometries that were previously considered infeasible . However, the highly localized energy input and rapid thermal cycles seen in beam-based metal AM are common causes of solidification cracking and anisotropic mechanical properties. Various studies have shown approaches to address the processing defects and material anisotropy in powder-based AM, such as creating AM-specific alloy materials or decorating the feedstock powder with grain modifiers. These solutions can be economically burdensome and do not fully leverage the in-situ material formation in AM. My work aims to expand the portfolio of AM capabilities through in-situ reactive printing (IRP). This advanced processing technique forms material with chemical reactions triggered by localized energy input and rigorous thermal-driven mixing during AM material solidification.In chapters two and three, I discuss the IRP of metal matrix composite focusing on the binary material system of aluminum (Al) and titanium (Ti). I begin with a feasibility study of IRP by fabricating in-situ TiAl3-reinforced aluminum matrix composites (AMC). It demonstrates improved processibility of AM aluminum and shows the capability of IRP to create compositional tunability with an extended ceiling of AMC intermetallic volume fraction. I further optimize the microstructure for enhanced tunable tensile properties and discuss the dual functions of the in-situ formed TiAl3 reinforcement phase: load transfer strengthening and grain refinement by providing heterogeneous nucleation sites.Extending the application of IRP, I fabricate porous metal and explain a post-process framework created to automate the collection of pore statistics from high-speed X-ray image sequences of operando synchrotron experiments elucidating the dynamic process of pore formation. Discussions on the effects of foaming agent type, content, and different processing parameters on porosity characteristics are presented in the fourth chapter. The findings shed light on AM enabling the fabrication of free-form porous metal structures and guide design choices for future AM porous metals.
■590 ▼aSchool code: 0058.
■650 4▼aMechanical engineering
■650 4▼aEngineering
■650 4▼aMaterials science
■653 ▼aAdditive manufacturing
■653 ▼aAluminum matrix composites
■653 ▼aIn-situ reactive printing
■653 ▼aOperando synchrotron study
■653 ▼aPorous metal
■690 ▼a0548
■690 ▼a0794
■690 ▼a0537
■71020▼aCornell University▼bMechanical Engineering.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162623▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
