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Material Response to Fretting and Sliding Wear Phenomena
Material Response to Fretting and Sliding Wear Phenomena
Material Response to Fretting and Sliding Wear Phenomena

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자료유형  
 학위논문 서양
최종처리일시  
20250211151407
ISBN  
9798342104746
DDC  
300
저자명  
Sharma, Akshat.
서명/저자  
Material Response to Fretting and Sliding Wear Phenomena
발행사항  
[Sl] : Purdue University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
172 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
주기사항  
Advisor: Sadeghi, Farshid.
학위논문주기  
Thesis (Ph.D.)--Purdue University, 2024.
초록/해제  
요약Fretting wear occurs when two contacting bodies under load are subjected to small amplitude oscillatory motion. Depending on the applied normal load, displacement amplitude, coefficient of friction and resulting shear force, two types of fretting wear regimes exist - (i) partial slip and (ii) gross slip. At displacement amplitudes higher than gross slip condition, sliding wear regime prevails. Fretting wear becomes dominant in machine components subject to vibrations such as bearings, dovetail joints, etc. whereas sliding wear is observed in brakes, piston-ring applications, etc. The work in this dissertation primarily focuses on characterizing the material response of various machine components subjected to fretting and sliding wear regimes.At first, the friction and fretting wear behavior of inlet ring and spring clip components used in land-based gas turbines was investigated at elevated (500°C) temperature. In order to achieve this objective, a novel high-temperature fretting wear apparatus was designed and developed to simulate the conditions existing in a gas turbine. The test apparatus was used to investigate fretting wear of atmospheric plasma sprayed (APS) Cr3C2-NiCr (25% wt.), high-velocity oxy-fuel (HVOF) sprayed Cr3C2-NiCr (25% wt.), HVOF sprayed T-800 and APS sprayed PS400coated inlet rings against HVOF-sprayed Cr3C2-NiCr (25% wt.) coated spring clip. The PS400 coated inlet rings demonstrated a significant reduction in friction and wear. A finite element (FE) framework was also developed to simulate fretting wear in HVOF-sprayed Cr3C2-NiCr composite cermet coating. The material microstructure was modelled using Voronoi tessellations with a log-normal distribution of grain size. Moreover, the individual material phases in the coating were randomly assigned to resemble the microstructure from an actual SEM micrograph. A damage mechanics based cohesive zone model with grain deletion algorithm was used to simulate debonding of the ceramic carbide phase from the matrix and resulting degradation from repeated fretting cycles. The specific wear rate obtained from the model for the existing material microstructure was benchmarked against experiments. Novel material microstructures were also modeled and demonstrated to show less scatter in wear rate.Following, a three-dimensional (3D) continuum damage mechanics (CDM) FE model was developed to investigate the effects of fretting wear on rolling contact fatigue (RCF) of bearing steels. In order to determine the fretting scar geometry, a 3D arbitrary Lagrangian-Eulerian (ALE) adaptive mesh (AM) FE model was developed to simulate fretting wear between two elastic bodies for different initially pristine fretting pressures (0.5, 0.75 and 1 GPa) and friction coefficients (0.15, 0.175 and 0.25) resulting in stick zone to contact width ratios, c/a = 0.35, 0.55 and 0.75. The resulting wear profiles were subjected to various initially pristine RCF pressures (1, 2.2 and 3.4 GPa). The pressure profiles for RCF were determined by moving the contact over the fretted wear profiles in 21 steps. These pressure profiles were then used in the CDM-FE model to predict the RCF life of fretted surfaces. The results indicate that increased fretting pressure leads to more wear on the surface, thereby reducing RCF life. As the RCF pressure increases (PRCF≥ 2.2 GPa), the effect of fretting on RCF life decreases for all fretting pressures and c/a values, indicating that life is primarily governed by the RCF pressure.
일반주제명  
Load
일반주제명  
Humidity
일반주제명  
Bearings
일반주제명  
Grain boundaries
일반주제명  
Normal distribution
일반주제명  
Crack initiation
일반주제명  
Wear tests
일반주제명  
Adhesive wear
일반주제명  
Energy
일반주제명  
Grain size
일반주제명  
Microstructure
일반주제명  
Mechanics
일반주제명  
Boundary conditions
일반주제명  
Nitrogen
일반주제명  
Corrosion
일반주제명  
Friction
일반주제명  
Carbon
일반주제명  
Wear resistance
일반주제명  
Chemical vapor deposition
일반주제명  
Lubricants & lubrication
일반주제명  
Industrial engineering
일반주제명  
Materials science
일반주제명  
Mathematics
기타저자  
Purdue University.
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
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■1001  ▼aSharma,  Akshat.
■24510▼aMaterial  Response  to  Fretting  and  Sliding  Wear  Phenomena
■260    ▼a[Sl]▼bPurdue  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a172  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-04,  Section:  B.
■500    ▼aAdvisor:  Sadeghi,  Farshid.
■5021  ▼aThesis  (Ph.D.)--Purdue  University,  2024.
■520    ▼aFretting  wear  occurs  when  two  contacting  bodies  under  load  are  subjected  to  small  amplitude  oscillatory  motion.  Depending  on  the  applied  normal  load,  displacement  amplitude,  coefficient  of  friction  and  resulting  shear  force,  two  types  of  fretting  wear  regimes  exist  -  (i)  partial  slip  and  (ii)  gross  slip.  At  displacement  amplitudes  higher  than  gross  slip  condition,  sliding  wear  regime  prevails.  Fretting  wear  becomes  dominant  in  machine  components  subject  to  vibrations  such  as  bearings,  dovetail  joints,  etc.  whereas  sliding  wear  is  observed  in  brakes,  piston-ring  applications,  etc.  The  work  in  this  dissertation  primarily  focuses  on  characterizing  the  material  response  of  various  machine  components  subjected  to  fretting  and  sliding  wear  regimes.At  first,  the  friction  and  fretting  wear  behavior  of  inlet  ring  and  spring  clip  components  used  in  land-based  gas  turbines  was  investigated  at  elevated  (500°C)  temperature.  In  order  to  achieve  this  objective,  a  novel  high-temperature  fretting  wear  apparatus  was  designed  and  developed  to  simulate  the  conditions  existing  in  a  gas  turbine.  The  test  apparatus  was  used  to  investigate  fretting  wear  of  atmospheric  plasma  sprayed  (APS)  Cr3C2-NiCr  (25%  wt.),  high-velocity  oxy-fuel  (HVOF)  sprayed  Cr3C2-NiCr  (25%  wt.),  HVOF  sprayed  T-800  and  APS  sprayed  PS400coated  inlet  rings  against  HVOF-sprayed  Cr3C2-NiCr  (25%  wt.)  coated  spring  clip.  The  PS400  coated  inlet  rings  demonstrated  a  significant  reduction  in  friction  and  wear.  A  finite  element  (FE)  framework  was  also  developed  to  simulate  fretting  wear  in  HVOF-sprayed  Cr3C2-NiCr  composite  cermet  coating.  The  material  microstructure  was  modelled  using  Voronoi  tessellations  with  a  log-normal  distribution  of  grain  size.  Moreover,  the  individual  material  phases  in  the  coating  were  randomly  assigned  to  resemble  the  microstructure  from  an  actual  SEM  micrograph.  A  damage  mechanics  based  cohesive  zone  model  with  grain  deletion  algorithm  was  used  to  simulate  debonding  of  the  ceramic  carbide  phase  from  the  matrix  and  resulting  degradation  from  repeated  fretting  cycles.  The  specific  wear  rate  obtained  from  the  model  for  the  existing  material  microstructure  was  benchmarked  against  experiments.  Novel  material  microstructures  were  also  modeled  and  demonstrated  to  show  less  scatter  in  wear  rate.Following,  a  three-dimensional  (3D)  continuum  damage  mechanics  (CDM)  FE  model  was  developed  to  investigate  the  effects  of  fretting  wear  on  rolling  contact  fatigue  (RCF)  of  bearing  steels.  In  order  to  determine  the  fretting  scar  geometry,  a  3D  arbitrary  Lagrangian-Eulerian  (ALE)  adaptive  mesh  (AM)  FE  model  was  developed  to  simulate  fretting  wear  between  two  elastic  bodies  for  different  initially  pristine  fretting  pressures  (0.5,  0.75  and  1  GPa)  and  friction  coefficients  (0.15,  0.175  and  0.25)  resulting  in  stick  zone  to  contact  width  ratios,  c/a  =  0.35,  0.55  and  0.75.  The  resulting  wear  profiles  were  subjected  to  various  initially  pristine  RCF  pressures  (1,  2.2  and  3.4  GPa).  The  pressure  profiles  for  RCF  were  determined  by  moving  the  contact  over  the  fretted  wear  profiles  in  21  steps.  These  pressure  profiles  were  then  used  in  the  CDM-FE  model  to  predict  the  RCF  life  of  fretted  surfaces.  The  results  indicate  that  increased  fretting  pressure  leads  to  more  wear  on  the  surface,  thereby  reducing  RCF  life.  As  the  RCF  pressure  increases  (PRCF≥  2.2  GPa),  the  effect  of  fretting  on  RCF  life  decreases  for  all  fretting  pressures  and  c/a  values,  indicating  that  life  is  primarily  governed  by  the  RCF  pressure.
■590    ▼aSchool  code:  0183.
■650  4▼aLoad
■650  4▼aHumidity
■650  4▼aBearings
■650  4▼aGrain  boundaries
■650  4▼aNormal  distribution
■650  4▼aCrack  initiation
■650  4▼aWear  tests
■650  4▼aAdhesive  wear
■650  4▼aEnergy
■650  4▼aGrain  size
■650  4▼aMicrostructure
■650  4▼aMechanics
■650  4▼aBoundary  conditions
■650  4▼aNitrogen
■650  4▼aCorrosion
■650  4▼aFriction
■650  4▼aCarbon
■650  4▼aWear  resistance
■650  4▼aChemical  vapor  deposition
■650  4▼aLubricants  &  lubrication
■650  4▼aIndustrial  engineering
■650  4▼aMaterials  science
■650  4▼aMathematics
■690    ▼a0791
■690    ▼a0346
■690    ▼a0546
■690    ▼a0794
■690    ▼a0405
■71020▼aPurdue  University.
■7730  ▼tDissertations  Abstracts  International▼g86-04B.
■790    ▼a0183
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161523▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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