서브메뉴
검색
Study of ⟨a⟩-Type Screw Dislocations in α-Ti
Study of ⟨a⟩-Type Screw Dislocations in α-Ti
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104817
- ISBN
- 9798293892457
- DDC
- 620.11
- 저자명
- Jany, David.
- 서명/저자
- Study of ⟨a⟩-Type Screw Dislocations in α-Ti
- 발행사항
- [Sl] : University of California, Berkeley, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 74 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Papadopoulos, Panos.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Berkeley, 2025.
- 초록/해제
- 요약Titanium alloys are widely used in modern technologies due to their high strength-to-density ratio and excellent corrosion resistance, but their high production cost limits broader application. This work advances the understanding of plastic deformation in α-Ti, where ⟨a⟩-type dislocations are the primary carriers of plasticity. Their motion is constrained by the motion of their screw component. This study examines how temperature and external stress affect screw dislocation mobility by analyzing the structure of their cores.This work uses atomistic simulation to analyze the morphology of dislocation cores. Methods to identify metastable core morphologies at 0K are developed, revealing a variety of nonplanar cores using a semi-empirical potential to describe the interactions between titanium atoms. Molecular dynamics simulations show how these cores affect dislocation mobility under temperature and non-Schmid stresses. To quantify the impact of non-Schmid stresses on the dislocation morphology, an elastic dipole tensor is introduced to describe the interaction between the dislocation core displacement field and external s tresses. The effect of non-Schmid stress on the mobility of dislocations is discussed, and the model is used to assess the properties of oriented single crystals.
- 일반주제명
- Materials science
- 일반주제명
- Engineering
- 일반주제명
- Mechanical engineering
- 키워드
- Dislocation
- 키워드
- Plasticity
- 키워드
- Titanium
- 기타저자
- University of California, Berkeley Mechanical Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358976
■00520260202104817
■006m o d
■007cr#unu||||||||
■020 ▼a9798293892457
■035 ▼a(MiAaPQ)AAI32168678
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.11
■1001 ▼aJany, David.
■24510▼aStudy of ⟨a⟩-Type Screw Dislocations in α-Ti
■260 ▼a[Sl]▼bUniversity of California, Berkeley▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a74 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Papadopoulos, Panos.
■5021 ▼aThesis (Ph.D.)--University of California, Berkeley, 2025.
■520 ▼aTitanium alloys are widely used in modern technologies due to their high strength-to-density ratio and excellent corrosion resistance, but their high production cost limits broader application. This work advances the understanding of plastic deformation in α-Ti, where ⟨a⟩-type dislocations are the primary carriers of plasticity. Their motion is constrained by the motion of their screw component. This study examines how temperature and external stress affect screw dislocation mobility by analyzing the structure of their cores.This work uses atomistic simulation to analyze the morphology of dislocation cores. Methods to identify metastable core morphologies at 0K are developed, revealing a variety of nonplanar cores using a semi-empirical potential to describe the interactions between titanium atoms. Molecular dynamics simulations show how these cores affect dislocation mobility under temperature and non-Schmid stresses. To quantify the impact of non-Schmid stresses on the dislocation morphology, an elastic dipole tensor is introduced to describe the interaction between the dislocation core displacement field and external s tresses. The effect of non-Schmid stress on the mobility of dislocations is discussed, and the model is used to assess the properties of oriented single crystals.
■590 ▼aSchool code: 0028.
■650 4▼aMaterials science
■650 4▼aEngineering
■650 4▼aMechanical engineering
■653 ▼aAtomistic simulations
■653 ▼aDislocation
■653 ▼aPlasticity
■653 ▼aTitanium
■690 ▼a0794
■690 ▼a0537
■690 ▼a0548
■71020▼aUniversity of California, Berkeley▼bMechanical Engineering.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0028
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358976▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
