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1. 发明授权

US08155940B2 Methods and systems for predicting very high cycle fatigue properties in metal alloys 有权
标题翻译：用于预测金属合金中非常高的循环疲劳性能的方法和系统
公开(公告)号：US08155940B2
公开(公告)日：2012-04-10
申请号：US12182314
申请日：2008-07-30
申请人： Qigui Wang , Bob R. Powell, Jr. , Peggy E. Jones , Cherng-Chi Chang
发明人： Qigui Wang , Bob R. Powell, Jr. , Peggy E. Jones , Cherng-Chi Chang
IPC分类号： G06G7/48
CPC分类号： G06F17/5009 , G06F2217/10 , G06F2217/16 , G06F2217/76
摘要： A system and method for predicting fatigue life in metal alloys for very high cycle fatigue applications. The system and method are especially useful for cast metal alloys, such as cast aluminum alloys, where a fatigue endurance limit is either non-existent or hard to discern. Fatigue properties, such as fatigue strength in the very high cycle fatigue region, are based on a modified random fatigue limit model, where the very high cycle fatigue strength and infinite life fatigue strength are refined to take into consideration the sizes of the discontinuities and microstructure constituents since the fatigue life scatter depends upon the presence of discontinuities and microstructure constituents. The sizes of the discontinuities and microstructure constituents that can initiate fatigue cracks can be determined with extreme value statistics, then input to the modified random fatigue limit model.
摘要翻译：用于预测非常高循环疲劳应用中金属合金疲劳寿命的系统和方法。该系统和方法对于铸造金属合金（例如铸铝合金）尤其有用，其中疲劳耐力极限不存在或难以辨别。疲劳性能，如非常高的循环疲劳区域的疲劳强度，基于改进的随机疲劳极限模型，其中非常高的循环疲劳强度和无限寿命疲劳强度得到细化，以考虑到不连续性和微观结构的尺寸因为疲劳寿命分散取决于不连续性和微结构组分的存在。可以用极值统计量确定可以引发疲劳裂纹的不连续性和微观组分的尺寸，然后输入到修改的随机疲劳极限模型。

2. 发明申请

US20100030537A1 METHODS AND SYSTEMS FOR PREDICTING VERY HIGH CYCLE FATIGUE PROPERTIES IN METAL ALLOYS 有权
标题翻译：用于预测金属合金中非常高的周期疲劳特性的方法和系统
公开(公告)号：US20100030537A1
公开(公告)日：2010-02-04
申请号：US12182314
申请日：2008-07-30
申请人： Qigui Wang , Bob R. Powell, JR. , Peggy E. Jones , Cherng-Chi Chang
发明人： Qigui Wang , Bob R. Powell, JR. , Peggy E. Jones , Cherng-Chi Chang
IPC分类号： G06G7/48
CPC分类号： G06F17/5009 , G06F2217/10 , G06F2217/16 , G06F2217/76
摘要： A system and method for predicting fatigue life in metal alloys for very high cycle fatigue applications. The system and method are especially useful for cast metal alloys, such as cast aluminum alloys, where a fatigue endurance limit is either non-existent or hard to discern. Fatigue properties, such as fatigue strength in the very high cycle fatigue region, are based on a modified random fatigue limit model, where the very high cycle fatigue strength and infinite life fatigue strength are refined to take into consideration the sizes of the discontinuities and microstructure constituents since the fatigue life scatter depends upon the presence of discontinuities and microstructure constituents. The sizes of the discontinuities and microstructure constituents that can initiate fatigue cracks can be determined with extreme value statistics, then input to the modified random fatigue limit model.
摘要翻译：用于预测非常高循环疲劳应用中金属合金疲劳寿命的系统和方法。该系统和方法对于铸造金属合金（例如铸铝合金）尤其有用，其中疲劳耐力极限不存在或难以辨别。疲劳性能，如非常高的循环疲劳区域的疲劳强度，基于改进的随机疲劳极限模型，其中非常高的循环疲劳强度和无限寿命疲劳强度得到细化，以考虑到不连续性和微观结构的尺寸因为疲劳寿命分散取决于不连续性和微结构组分的存在。可以用极值统计量确定可以引发疲劳裂纹的不连续性和微观组分的尺寸，然后输入到修改的随机疲劳极限模型。

3. 发明申请

US20120041726A1 METHOD FOR SIMULATING TRANSIENT HEAT TRANSFER AND TEMPERATURE DISTRIBUTION OF ALUMINUM CASTINGS DURING WATER QUENCHING 有权
标题翻译：模拟水淬火过程中铝铸件瞬态热传递和温度分布的方法
公开(公告)号：US20120041726A1
公开(公告)日：2012-02-16
申请号：US12856257
申请日：2010-08-13
申请人： Qigui Wang , Cherng-Chi Chang , Jayaraman Sivakumar , Michael R. Harper
发明人： Qigui Wang , Cherng-Chi Chang , Jayaraman Sivakumar , Michael R. Harper
IPC分类号： G06G7/56 , G06G7/57 , G06F17/10 , G01K17/00 , G06F15/00
CPC分类号： C22F1/04 , C21D1/60 , C21D11/005 , Y02T10/82
摘要： The invention relates to a method for estimating heat transfer during water quench of an aluminum part. The method includes: estimating the heat transfer of the aluminum part when a temperature of the part is greater than 500° C. using q=α(ΔT) (1); estimating the heat transfer of the aluminum part when the temperature of the part is greater than T2 and less than 500° C. using q=k1ΔTk2 (4); estimating the heat transfer of the aluminum part when the temperature of the part is greater than T1 and less than T2 using a critical point function equation selected from: q = q max - q 0  ( T metal - T max T 2 - T 1 ) 2 , ( 3 ) q n = a 0 + a 1  Δ   T + a 2  Δ   T 2 + a 3  Δ   T 3 + … + a n  Δ   T n , ( 6 ) q = q max - ( 1 - 4  ( ( 1 - ϕ )  ( T metal - T max T 2 - T 1 ) 2 ) , ( 7 ) q = q max - ( 1 - ( T metal - T max T 2 - T 1 ) 2 ) ,  or ( 8 ) q  ( T 1 ) = q  ( T 2 ) = ϕ   q max ; ( 9 ) estimating the heat transfer of the aluminum part when the temperature of the part is less than T1 using q=c1ΔTc2 (5). Systems, methods, and articles to predict transient heat transfer, or temperature distribution, or both of a quenched aluminum casting are also described.
摘要翻译：本发明涉及一种用于估计铝部件的骤冷期间的传热的方法。该方法包括：使用q =α（＆Dgr; T）（1），当部件的温度大于500℃时，估计铝部件的传热。使用q = k1＆Dgr; Tk2（4）估计部件的温度大于T2且小于500℃时铝部件的传热。使用选自以下的临界点函数方程，估计部件的温度大于T1且小于T2时铝部件的传热：q = q max-q 0（T metal-T max T 2 -T 1 ）2，（3）qn = a 0 + a 1＆Dgr; 技术T + a 2＆Dgr 电话T 2 + a 3＆Dgr ㄧT 3 + ... + a n＆Dgr （6）q = q max - （1 - 4（（1 - ＆Phis））（T metal - T max T 2 - T 1）2），（7）q = q max - （（T金属T max T 2 - T 1）2），或（8）q（T 1）= q（T 2）=＆phis;q max;（9）估计传热也可以使用q = c1＆Dgr; Tc2（5）来测量部件的温度是否小于T1时的铝部件，也描述了用于预测瞬态热传递或温度分布的系统，方法和制品，或两者的淬火铝铸件。

4. 发明授权

US08447574B2 Method for simulating transient heat transfer and temperature distribution of aluminum castings during water quenching 有权
标题翻译：在水淬期间模拟铝铸件的瞬态热传递和温度分布的方法
公开(公告)号：US08447574B2
公开(公告)日：2013-05-21
申请号：US12856257
申请日：2010-08-13
申请人： Qigui Wang , Cherng-Chi Chang , Jayaraman Sivakumar , Michael R. Harper
发明人： Qigui Wang , Cherng-Chi Chang , Jayaraman Sivakumar , Michael R. Harper
IPC分类号： G06F17/10
CPC分类号： C22F1/04 , C21D1/60 , C21D11/005 , Y02T10/82
摘要： The invention relates to a method for estimating heat transfer during water quench of an aluminum part. The method includes: estimating the heat transfer of the aluminum part when a temperature of the part is greater than 500° C. using q=α(ΔT) (1); estimating the heat transfer of the aluminum part when the temperature of the part is greater than T2 and less than 500° C. using q=k1ΔTk2 (4); estimating the heat transfer of the aluminum part when the temperature of the part is greater than T1 and less than T2 using a critical point function equation selected from: q = q max - q 0 ⁡ ( T metal - T max T 2 - T 1 ) 2 , ( 3 ) q n = a 0 + a 1 ⁢ Δ ⁢ ⁢ T + a 2 ⁢ Δ ⁢ ⁢ T 2 + a 3 ⁢ Δ ⁢ ⁢ T 3 + … + a n ⁢ Δ ⁢ ⁢ T n , ( 6 ) q = q max - ( 1 - 4 ⁢ ( ( 1 - φ ) ⁢ ( T metal - T max T 2 - T 1 ) 2 ) , ( 7 ) q = q max - ( 1 - ( T metal - T max T 2 - T 1 ) 2 ) , ⁢ or ( 8 ) q ⁡ ( T 1 ) = q ⁡ ( T 2 ) = φ ⁢ ⁢ q max ; ( 9 ) estimating the heat transfer of the aluminum part when the temperature of the part is less than T1 using q=c1ΔTc2 (5). Systems, methods, and articles to predict transient heat transfer, or temperature distribution, or both of a quenched aluminum casting are also described.
摘要翻译：本发明涉及一种用于估计铝部件的骤冷期间的传热的方法。该方法包括：当部件的温度大于500℃时，使用q =α（ΔT）（1）估计铝部件的传热; 使用q = k1DeltaTk2（4），当部件的温度大于T2且小于500℃时，估计铝部件的传热。使用选自以下的临界点函数方程，估计部件的温度大于T1且小于T2时铝部件的传热：q = q max -q 0⁡（T metal-T max T 2 -T 1 ）2，（3）qn = a 0 + a 1增量T + a 2变换T 2 + a 3增量T 3 + ... + a Delta固有T n，（ 6）q = q max - （1 - 4（（1-phi）（T metal-T max T 2 -T 1）2），（7）q = q max - （1 - （T metal-T 最大T 2 - T 1）2），或（8）q⁡（T 1）= q⁡（T 2）= phi？qq max;（9）估计铝部件的温度还描述了使用q = c1DeltaTc2（5）的部分小于T1。用于预测瞬态热传递或温度分布的系统，方法和制品，或两者都是淬火铝铸件。

5. 发明申请

US20100292966A1 Methods of predicting residual stresses and distortion in quenched aluminum castings 有权
标题翻译：预测淬火铝铸件残余应力和变形的方法
公开(公告)号：US20100292966A1
公开(公告)日：2010-11-18
申请号：US12454087
申请日：2009-05-12
申请人： Qigui Wang , Cherng-Chi Chang , David Paluch , Guihua Zhang
发明人： Qigui Wang , Cherng-Chi Chang , David Paluch , Guihua Zhang
IPC分类号： G06G7/56 , G06F17/10 , G06G7/48
CPC分类号： G06F17/5018 , G06F2217/80
摘要： Computational systems, methods, and articles of manufacture to predict at least one of residual stresses and distortion in quenched aluminum castings. Residual stresses and distortion may be predicted through incorporating thermal strains induced during quenching with the nonlinear constitutive behavior of quenched microstructures of a quenched aluminum casting, wherein thermal strains arise generally from non-uniform transient temperature distribution of the casting during quenching. The transient temperature distribution of the aluminum casting during quenching may be calculated based on heat transfer coefficients specific to one or more nodes, elements and/or zones on the surfaces of the aluminum casting. The nonlinear constitutive behavior of the quenched aluminum casting may be modeled as functions of temperatures, strain rates, and microstructure variations. A material constitutive model accounts for not only strain hardening and creep, but also precipitate hardening. Thereby, residual stresses and distortion in the quenched aluminum castings can be predicted using the embodiments.
摘要翻译：计算系统，方法和制品，以预测淬火铝铸件的残余应力和变形中的至少一个。残余应力和变形可以通过在淬火期间引入的热应变与淬火铝铸件的淬火微结构的非线性本构行为相结合来预测，其中热应变一般来自淬火期间铸件的非均匀瞬态温度分布。淬火期间铝铸件的瞬态温度分布可以基于特定于铝铸件表面上的一个或多个节点，元件和/或区域的传热系数来计算。淬火铝铸件的非线性本构行为可以模拟为温度，应变速率和微结构变化的函数。材料本构模型不仅涉及应变硬化和蠕变，还涉及沉淀硬化。因此，可以使用实施例来预测淬火铝铸件中的残余应力和变形。

6. 发明授权

US08214182B2 Methods of predicting residual stresses and distortion in quenched aluminum castings 有权
标题翻译：预测淬火铝铸件残余应力和变形的方法
公开(公告)号：US08214182B2
公开(公告)日：2012-07-03
申请号：US12454087
申请日：2009-05-12
申请人： Qigui Wang , Cherng-Chi Chang , David Paluch , Guihua Zhang
发明人： Qigui Wang , Cherng-Chi Chang , David Paluch , Guihua Zhang
IPC分类号： G06F17/10
CPC分类号： G06F17/5018 , G06F2217/80
摘要： Computational systems, methods, and articles of manufacture to predict at least one of residual stresses and distortion in quenched aluminum castings. Residual stresses and distortion may be predicted through incorporating thermal strains induced during quenching with the nonlinear constitutive behavior of quenched microstructures of a quenched aluminum casting, wherein thermal strains arise generally from non-uniform transient temperature distribution of the casting during quenching. The transient temperature distribution of the aluminum casting during quenching may be calculated based on heat transfer coefficients specific to one or more nodes, elements and/or zones on the surfaces of the aluminum casting. The nonlinear constitutive behavior of the quenched aluminum casting may be modeled as functions of temperatures, strain rates, and microstructure variations. A material constitutive model accounts for not only strain hardening and creep, but also precipitate hardening. Thereby, residual stresses and distortion in the quenched aluminum castings can be predicted using the embodiments.
摘要翻译：计算系统，方法和制品，以预测淬火铝铸件的残余应力和变形中的至少一个。残余应力和变形可以通过在淬火期间引入的热应变与淬火铝铸件的淬火微结构的非线性本构行为相结合来预测，其中热应变一般来自淬火期间铸件的非均匀瞬态温度分布。淬火期间铝铸件的瞬态温度分布可以基于特定于铝铸件表面上的一个或多个节点，元件和/或区域的传热系数来计算。淬火铝铸件的非线性本构行为可以模拟为温度，应变速率和微结构变化的函数。材料本构模型不仅涉及应变硬化和蠕变，还涉及沉淀硬化。因此，可以使用实施例来预测淬火铝铸件中的残余应力和变形。

7. 发明授权

US08323425B2 Artificial aging process for aluminum alloys 有权
标题翻译：铝合金人造老化工艺
公开(公告)号：US08323425B2
公开(公告)日：2012-12-04
申请号：US12042639
申请日：2008-03-05
申请人： Qigui Wang , Peggy E. Jones
发明人： Qigui Wang , Peggy E. Jones
IPC分类号： C21D11/00 , C22C21/00 , C22F1/04
CPC分类号： C22C21/00 , C22F1/04
摘要： Embodiments of a method for non-isothermally aging an aluminum alloy are provided. The method comprises heating an aluminum alloy at a first ramp-up rate to a maximum temperature below a precipitate solvus value, cooling the alloy at a first cooling rate sufficient to produce a maximum number of primary precipitates, cooling at a second cooling rate until a minimum temperature is reached wherein the growth rate of primary precipitates is equal to or substantially zero, and heating the alloy at a second ramp-up rate to a temperature sufficient to produce a maximum number of secondary precipitates.
摘要翻译：提供了一种非等温老化铝合金的方法的实施例。该方法包括将铝合金以第一加速速率加热至低于沉淀溶质值的最高温度，以足以产生最大数量的一次沉淀的第一冷却速率冷却合金，以第二冷却速率冷却至达到最初温度，其中初级沉淀物的生长速率等于或基本上为零，并且以第二升温速率将合金加热至足以产生最大数量的二次沉淀物的温度。

8. 发明申请

US20090276166A1 METHODS AND SYSTEMS TO PREDICT FATIGUE LIFE IN ALUMINUM CASTINGS 有权
标题翻译：在铝铸件中预测疲劳寿命的方法和系统
公开(公告)号：US20090276166A1
公开(公告)日：2009-11-05
申请号：US12114875
申请日：2008-05-05
申请人： Qigui Wang , Peggy E. Jones
发明人： Qigui Wang , Peggy E. Jones
IPC分类号： G06F19/00 , G06F15/00
CPC分类号： G06F17/5009 , G01M5/0033 , G06F2217/10
摘要： Methods and systems of predicting fatigue life in aluminum castings that combines extreme values of both casting flaws and microstructures with multiscale life models. The multiscale life models account for differing fatigue crack initiation based on the size scale of the defect and microstructure features, including provisions for generally millimeter scale casting flaws, generally micrometer scale second phase particles by cracking or debonding, or submicrometer scale dislocation interactions with precipitates which form persistent slip bands. In the presence of casting flaws, the fatigue initiation life is negligible and the total fatigue life is spent in propagation of a fatigue crack from such flaws. In the absence of casting flaws, however, the total fatigue life is spent in both crack initiation and propagation, except for the case where fatigue cracks initiate from large second phase particles in a coarse microstructure. The extreme values of casting flaws, second phase particles, mean free path through an aluminum matrix or grain sizes are obtained from extreme value statistics when two or three dimensional sizes of casting flaws and microstructure features are provided by either direct measurement or analytical prediction. The upper bound flaw or microstructure feature size is calculated by extreme value statistics.
摘要翻译：预测铝铸件疲劳寿命的方法和系统，其将铸造缺陷和微观结构的极值与多尺度寿命模型相结合。多尺度寿命模型基于缺陷和微结构特征的尺寸规模来考虑不同的疲劳裂纹开始，包括通常为毫米级铸造缺陷的规定，通常是通过裂纹或剥离的微米级第二相颗粒，或与沉淀物的亚微米级位错相互作用形成持续滑带。在存在铸造缺陷的情况下，疲劳起始寿命可以忽略不计，并且疲劳寿命用于从这种缺陷传播疲劳裂纹。然而，在没有铸造缺陷的情况下，除了在粗糙微结构中的大的第二相颗粒引发疲劳裂纹的情况下，总的疲劳寿命也用于裂纹开始和扩展。通过直接测量或分析预测提供铸造瑕疵和微结构特征的两维或三维尺寸时，铸造缺陷，第二相颗粒，平均通过铝基体或颗粒尺寸的自由程的极值来自极值统计。通过极值统计计算上界缺陷或微结构特征尺寸。

9. 发明授权

US08655476B2 Systems and methods for computationally developing manufacturable and durable cast components 有权
标题翻译：用于计算开发可制造和耐用的铸件的系统和方法
公开(公告)号：US08655476B2
公开(公告)日：2014-02-18
申请号：US13171502
申请日：2011-06-29
申请人： Qigui Wang , Peggy E. Jones , Yucong Wang , Dale A. Gerard
发明人： Qigui Wang , Peggy E. Jones , Yucong Wang , Dale A. Gerard
IPC分类号： G06F19/00
CPC分类号： G06F17/5018 , B22D46/00 , G06F2217/76 , Y02T10/82
摘要： A method and system for optimizing a simulated casting of a light weight alloy component. The simulation includes passing component design data through various computational modules relating to casting designs, process modeling and optimization, material microstructure and defects and product performance. Variations in microstructure and defects across various very small size scales are extended to increasingly larger scales to permit structural performance calculations of the cast component to take such non-uniformities into consideration. At least some of the modules employ an expert system-based approach to achieve the optimized results. The results can be compared to end user needs to determine if redesign of the part geometry or manufacturing process is needed.
摘要翻译：一种用于优化轻质合金部件的模拟铸造的方法和系统。模拟包括通过与铸造设计，过程建模和优化，材料微观结构和缺陷以及产品性能相关的各种计算模块传递部件设计数据。在各种非常小的尺寸尺度上的微观结构和缺陷的变化被扩展到越来越大的尺度，以允许铸造部件的结构性能计算考虑到这种不均匀性。至少一些模块采用基于专家系统的方法来实现优化的结果。可以将结果与最终用户的需求进行比较，以确定是否需要重新设计零件几何或制造过程。

10. 发明申请

US20120232685A1 SYSTEMS AND METHODS FOR COMPUTATIONALLY DEVELOPING MANUFACTURABLE AND DURABLE CAST COMPONENTS 有权
标题翻译：用于计算开发可制造和耐用的铸件组件的系统和方法
公开(公告)号：US20120232685A1
公开(公告)日：2012-09-13
申请号：US13171502
申请日：2011-06-29
申请人： Qigui Wang , Peggy E. Jones , Yucong Wang , Dale A. Gerard
发明人： Qigui Wang , Peggy E. Jones , Yucong Wang , Dale A. Gerard
IPC分类号： G06F17/50
CPC分类号： G06F17/5018 , B22D46/00 , G06F2217/76 , Y02T10/82
摘要： A method and system for optimizing a simulated casting of a light weight alloy component. The simulation includes passing component design data through various computational modules relating to casting designs, process modeling and optimization, material microstructure and defects and product performance. Variations in microstructure and defects across various very small size scales are extended to increasingly larger scales to permit structural performance calculations of the cast component to take such non-uniformities into consideration. At least some of the modules employ an expert system-based approach to achieve the optimized results. The results can be compared to end user needs to determine if redesign of the part geometry or manufacturing process is needed.
摘要翻译：一种优化轻质合金部件的模拟铸造的方法和系统。模拟包括通过与铸造设计，过程建模和优化，材料微观结构和缺陷以及产品性能相关的各种计算模块传递部件设计数据。在各种非常小的尺寸尺度上的微观结构和缺陷的变化被扩展到越来越大的尺度，以允许铸造部件的结构性能计算考虑到这种不均匀性。至少一些模块采用基于专家系统的方法来实现优化的结果。可以将结果与最终用户的需求进行比较，以确定是否需要重新设计零件几何或制造过程。

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