Recent Advances in Solids/Structures and Application of Metallic Materials最新文献_第2页

The Effect of Thermomechanical Strain Cycling on the Fatigue Life of Gas Turbine Material In-738LC: A Life Prediction Model 热应变循环对In-738LC燃气轮机材料疲劳寿命的影响:寿命预测模型

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0549

S. Zamrik, M. Renauld

{"title":"The Effect of Thermomechanical Strain Cycling on the Fatigue Life of Gas Turbine Material In-738LC: A Life Prediction Model","authors":"S. Zamrik, M. Renauld","doi":"10.1115/imece1997-0549","DOIUrl":"https://doi.org/10.1115/imece1997-0549","url":null,"abstract":"\u0000 Experimental and analytical method is developed to address the effect of thermomechanical fatigue (TMF) on a nickel base superalloy which is a γ’/ (Ni3Al) strengthened material used primarily for land based gas turbine blading. A life prediction model is developed on the basis of a tensile hysteresis energy approach which incorporates the effect of creep, environment, and temperature. The developed life prediction model has shown a good predictive capability to correlate most of IN-738 out-of-phase TMF data from numerous researchers into a 3x scatterband. The TMF tests were carried out on two sets of cyclic temperatures of 482–816°C (900–1500°F) and 482–871°C (900–1600°F). In addition, isothermal tests were carried out at 816°C (1500°F) under strain ranges from 0.3% to 0.8% for life comparison between isothermal and TMF. The results show that the TMF out-of-phase type cycle is the most damaging cycle for the IN-738LC material when compared to both in-phase and isothermal cycles. All experiments were strain-controlled with a triangular waveform and an A-ratio (A = εamp/εmean) = ∞.","PeriodicalId":407468,"journal":{"name":"Recent Advances in Solids/Structures and Application of Metallic Materials","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121506871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustained-Load Cracking in Mill Annealed Ti-6Al-4V at Room Temperature 室温退火Ti-6Al-4V的持续载荷开裂

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0547

Y. Lenets, James P. Thomas, T. Nicholas

引用次数: 0

Simplified Methodologies for the Characterization of Fatigue Crack Propagation in Metallic Structural Materials 金属结构材料疲劳裂纹扩展的简化表征方法

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0546

A. Soboyejo, W. Soboyejo

{"title":"Simplified Methodologies for the Characterization of Fatigue Crack Propagation in Metallic Structural Materials","authors":"A. Soboyejo, W. Soboyejo","doi":"10.1115/imece1997-0546","DOIUrl":"https://doi.org/10.1115/imece1997-0546","url":null,"abstract":"\u0000 In several important engineering applications, the need to develop simplified mechanistically-based methodologies has become a significant factor in the development of appropriate techniques in the choice of suitable components, structures and infrastructures. Several metallic structural materials which have been used in such systems have suffered severe structural damages, due to the initiation of fatigue cracks, and in several instances, these have resulted in catastrophic structural and mechanical failures. In addition to the above, the importance of environmental and climatological considerations, including the effects of other essential variables, which can contribute significantly to fatigue crack initiation, propagation and structural failures, need to be addressed and incorporated into the formulation of any new methodologies, which may be proposed to solve the practical engineering problems in this field.\u0000 The successful results of recent research work in this field are hereby presented, in order to provide practically acceptable and simple engineering methodologies, which can provide the much needed solutions to problems in several structural and mechanical engineering design applications. The important technical contributions from the recent results of engineering research in this field are hereby presented in this technical paper.","PeriodicalId":407468,"journal":{"name":"Recent Advances in Solids/Structures and Application of Metallic Materials","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126455367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement and Quantification of Surface Roughness 表面粗糙度的测量和量化

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0544

Timothy B. Dewhurst, S. Mason

{"title":"Measurement and Quantification of Surface Roughness","authors":"Timothy B. Dewhurst, S. Mason","doi":"10.1115/imece1997-0544","DOIUrl":"https://doi.org/10.1115/imece1997-0544","url":null,"abstract":"\u0000 The development of surface roughness during underlying bulk deformation is of critical importance to some metalforming industries such as beverage can and automobile manufacturers. This work is investigating the correlation between surface roughness and texture evolution within the material. The first phase of this work has concentrated on the measurement of surface roughness in compression specimens; various approaches to identifying meaningful metrics to quantify this roughness; and the documentation of the deformation path and texture evolution during the process. In identifying an appropriate metric for surface roughness, the work has focused on the use of fractals, standard statistical measures, and power spectrums. Each of these is evaluated for use in this type of study as it will be necessary in the near future to have a reliable method of comparing the experimental results to computer modeling for surface roughness. In the second phase of this work, polycrystal plasticity models will be used to track both texture evolution and the development of surface roughness during the deformation process. The computational results will be closely compared to the experimental results presented here.","PeriodicalId":407468,"journal":{"name":"Recent Advances in Solids/Structures and Application of Metallic Materials","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132719109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An Explicit Finite Element Study of Shear Localization During Orthogonal Cutting Process 正交切削过程剪切局部化的显式有限元研究

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0540

Denver Scott, J. Hong

引用次数: 0

Two Interpretations of Rigidity in Rigid Body Collisions 刚体碰撞中刚度的两种解释

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0522

A. Chatterjee, A. Ruina

引用次数: 0

Penetration Performance of the Train of Solid and Hollow Disks 实心和空心圆盘串的穿透性能

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0524

M. Lee

{"title":"Penetration Performance of the Train of Solid and Hollow Disks","authors":"M. Lee","doi":"10.1115/imece1997-0524","DOIUrl":"https://doi.org/10.1115/imece1997-0524","url":null,"abstract":"\u0000 The penetration performance of homogeneous disk (μ = 0) and thick walled disk (μ < 0.5) projectiles are investigated numerically for length-to-diameter ratio (L/D) of 1/8 and 1/4, where μ is the ratio of inner to outer diameter of a disk. Penetrations of tungsten alloy projectiles up to 4 successive solid disks (SD) and hollow disks (HD) with spacing of 1.5, 2 and 3 diameters into rolled homogeneous armor (RHA) at 2.6 km/s were simulated with a finite difference nonlinear wave propagation program. The most obvious results from the calculations are that even at 2.6 km/s the total penetration of a 4-segmented projectile can not be obtained simply be multiplying the depth of a single disk by four, especially for L/D = 1/8. Although HD may be more efficient, in terms of mass, than SD of equal outer diameter, it is observed that precursor or jet interacts with a train of spaced HD. This interaction significantly reduces the penetration performance, which was also measured in the long tubular projectiles. The degradation in total penetration becomes worse as μ increases. For HD of L/D = 1/4 case, the degradation in penetration becomes less since the effect of the interaction of jet with successive disks is relatively small.","PeriodicalId":407468,"journal":{"name":"Recent Advances in Solids/Structures and Application of Metallic Materials","volume":"704 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122985822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Robust Fail-Safe Structural Design Method 鲁棒故障安全结构设计方法研究

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0537

T. Hiroyasu, M. Shoji, H. Yamakawa

引用次数: 0

Predicting the Precipitation Hardening Response of Particle Strengthened Alloys Hardened by Ordered Precipitates 有序相淬硬颗粒强化合金的析出硬化响应预测

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0551

J. Fragomeni, B. Hillberry

{"title":"Predicting the Precipitation Hardening Response of Particle Strengthened Alloys Hardened by Ordered Precipitates","authors":"J. Fragomeni, B. Hillberry","doi":"10.1115/imece1997-0551","DOIUrl":"https://doi.org/10.1115/imece1997-0551","url":null,"abstract":"\u0000 A model/method was developed for predicting the precipitation hardening response of particle strengthened alloys hardened by ordered precipitates based on the microstructure, composition, and heat treatment, and utilizing a minimum number of experimental tests. The overall approach was based on the dislocation particle interaction mechanics, particle growth and coarsening, thermodynamics, and particle strengthening mechanisms applicable to precipitation hardened alloys. The model/method evaluates, from a minimum number of experimental tensile tests, several of the microstructural constants necessary in determining the precipitation strengthening response of a particle strengthened alloy. The materials that were used as vehicles to demonstrate the model were precipitation hardenable aluminum-lithium-zirconium and nickel-aluminum alloys. Utilizing these demonstration alloys, the method used a minimum number of four tensile tests to predict the variation in strength with aging time, aging temperature, and composition, for the underaged, the peak-aged, and the overaged conditions. Predictions of the precipitation strengthening response were made using the Wagner particle distribution model and the predicted results using this distribution model compared well with the experimental yield strength results.","PeriodicalId":407468,"journal":{"name":"Recent Advances in Solids/Structures and Application of Metallic Materials","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132317517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Investigation of the Effects of Multiple Parameters on the Fatigue Crack Growth Behavior of Ti-6Al-4V 多参数对Ti-6Al-4V疲劳裂纹扩展行为影响的研究

Recent Advances in Solids/Structures and Application of Metallic Materials Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0548

M. Foster, A. Soboyejo, N. Katsube, Sharmistha Dubey, W. Soboyejo

引用次数: 0