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High Throughput Process-Materials Framework for Repairing Ni-Based Superalloys
High Throughput Process-Materials Framework for Repairing Ni-Based Superalloys
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105505
- ISBN
- 9798263326265
- DDC
- 530.41
- 서명/저자
- High Throughput Process-Materials Framework for Repairing Ni-Based Superalloys
- 발행사항
- [Sl] : Georgia Institute of Technology, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 194 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Saldana, Christopher;Melkote, Shreyes.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2025.
- 초록/해제
- 요약This dissertation presents a high-throughput experimental and data-driven modeling framework to guide the repair and design of Ni-based superalloys using directed energy deposition. By leveraging compositionally graded IN625-IN100 alloy mixtures, the study systematically investigates cracking, microstructure evolution, and mechanical performance across varied compositions and processing conditions. The rationale for blending these alloys lies in their differing concentrations of γ'-forming elements Al and Ti in IN625 and IN100, which enables tuning of the γ' volume fraction and thus the resulting mechanical behavior and crack susceptibility. A high-throughput design of experiments efficiently identified crack-prone regimes, revealing that crack susceptibility is strongly influenced by both composition and thermal boundary conditions, which vary with part geometry and inter-layer timing. To support process-structure analysis, CALPHAD-based thermodynamic simulations were used to estimate phase stability and γ' solvus behavior across the varied compositions.Recognizing the virtually limitless design space of compositional and processing combinations, this work employs machine learning models to predict mechanical properties based on alloy chemistry, processing conditions, and microstructural features. Small punch testing and SEM image analysis, coupled with advanced segmentation methods, provide high-throughput material data to train Gaussian Process Regression (GPR) models. Additionally, Principal Component Analysis (PCA) of in-situ thermal histories enabled interpretable classification of cracking behavior under different compositions and conditions. The resulting CPSP models capture latent thermal and microstructural descriptors that govern property variation, enabling real-time process optimization. Altogether, this framework supports scalable, physics-aware process mapping and lays the foundation for accelerated qualification of complex AM components.
- 일반주제명
- Solidification
- 일반주제명
- Motion control
- 일반주제명
- Powder metallurgy
- 일반주제명
- Energy
- 일반주제명
- Microstructure
- 일반주제명
- Raw materials
- 일반주제명
- Cooling
- 일반주제명
- Lasers
- 일반주제명
- Ductility
- 일반주제명
- Support vector machines
- 일반주제명
- Stainless steel
- 일반주제명
- Analytical chemistry
- 일반주제명
- Industrial engineering
- 일반주제명
- Materials science
- 일반주제명
- Optics
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105505
■006m o d
■007cr#unu||||||||
■020 ▼a9798263326265
■035 ▼a(MiAaPQ)AAI32308023
■035 ▼a(MiAaPQ)GeorgiaTech78744
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530.41
■1001 ▼aAdapa, Venkata Surya Karthik Adapa.
■24510▼aHigh Throughput Process-Materials Framework for Repairing Ni-Based Superalloys
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a194 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Saldana, Christopher;Melkote, Shreyes.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2025.
■520 ▼aThis dissertation presents a high-throughput experimental and data-driven modeling framework to guide the repair and design of Ni-based superalloys using directed energy deposition. By leveraging compositionally graded IN625-IN100 alloy mixtures, the study systematically investigates cracking, microstructure evolution, and mechanical performance across varied compositions and processing conditions. The rationale for blending these alloys lies in their differing concentrations of γ'-forming elements Al and Ti in IN625 and IN100, which enables tuning of the γ' volume fraction and thus the resulting mechanical behavior and crack susceptibility. A high-throughput design of experiments efficiently identified crack-prone regimes, revealing that crack susceptibility is strongly influenced by both composition and thermal boundary conditions, which vary with part geometry and inter-layer timing. To support process-structure analysis, CALPHAD-based thermodynamic simulations were used to estimate phase stability and γ' solvus behavior across the varied compositions.Recognizing the virtually limitless design space of compositional and processing combinations, this work employs machine learning models to predict mechanical properties based on alloy chemistry, processing conditions, and microstructural features. Small punch testing and SEM image analysis, coupled with advanced segmentation methods, provide high-throughput material data to train Gaussian Process Regression (GPR) models. Additionally, Principal Component Analysis (PCA) of in-situ thermal histories enabled interpretable classification of cracking behavior under different compositions and conditions. The resulting CPSP models capture latent thermal and microstructural descriptors that govern property variation, enabling real-time process optimization. Altogether, this framework supports scalable, physics-aware process mapping and lays the foundation for accelerated qualification of complex AM components.
■590 ▼aSchool code: 0078.
■650 4▼aSolidification
■650 4▼aMotion control
■650 4▼aPowder metallurgy
■650 4▼aEnergy
■650 4▼aMicrostructure
■650 4▼aScanning electron microscopy
■650 4▼aRaw materials
■650 4▼aCooling
■650 4▼aLasers
■650 4▼aDuctility
■650 4▼aSupport vector machines
■650 4▼aStainless steel
■650 4▼aAnalytical chemistry
■650 4▼aIndustrial engineering
■650 4▼aMaterials science
■650 4▼aOptics
■690 ▼a0791
■690 ▼a0486
■690 ▼a0800
■690 ▼a0546
■690 ▼a0794
■690 ▼a0752
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360315▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


