公开(公告)号：US06914215B2

公开(公告)日：2005-07-05

申请号：US10608763

申请日：2003-06-27

申请人： Brian Michael Davis ,  Robert David McClain ,  Ui Won Suh ,  Seetha Ramaiah Mannava

发明人： Brian Michael Davis ,  Robert David McClain ,  Ui Won Suh ,  Seetha Ramaiah Mannava

IPC分类号： B23K26/03 ,  C21D10/00 ,  F01D5/28 ,  F01D21/00 ,  G01N29/12 ,  G01N29/24 ,  B23K26/00

CPC分类号： G01N29/12 ,  B23K26/03 ,  B23K31/125 ,  C21D10/005 ,  F01D5/286 ,  F01D21/003 ,  G01N29/2418 ,  G01N2291/0423 ,  G01N2291/0426

摘要： A real time method for quality control testing of a laser shock peening process of production workpieces by analysis of natural frequency shifts during the laser shock peening process. One particular embodiment includes laser shock peening surface of the production workpiece by firing a plurality of laser beam pulses on the surface and forming a plurality of corresponding plasmas, each one of the plasmas pulses having a duration in which the plasma causes a region having deep compressive residual stresses to form beneath the surface, measuring at least one natural frequency of the workpiece for each of the laser beam pulses, calculating natural frequency shifts from a baseline natural frequency for the measured natural frequencies for at least a portion of the laser beam pulses, and using the natural frequency shifts for accepting or rejecting the workpiece with respect to pass or fail criteria.

摘要翻译： 通过分析激光冲击硬化过程中的固有频率偏移，对生产工件的激光冲击硬化过程进行质量控制测试的实时方法。 一个具体实施例包括通过在表面上激发多个激光束脉冲并形成多个对应的等离子体来生产工件的激光冲击硬化表面，每个等离子体脉冲具有持续时间，其中等离子体引起具有深度压缩的区域 残余应力在表面下形成，测量每个激光束脉冲的工件的至少一个固有频率，从针对至少一部分激光束脉冲的测量固有频率的基线固有频率计算固有频率偏移， 并根据通过或不合格标准使用固有频率偏移来接收或拒绝工件。

公开(公告)号：US20080241546A1

公开(公告)日：2008-10-02

申请号：US11694214

申请日：2007-03-30

申请人： Robert David McClain ,  Brian Michael Davis ,  Seetha Ramaiah Mannava

发明人： Robert David McClain ,  Brian Michael Davis ,  Seetha Ramaiah Mannava

IPC分类号： B23K26/00

CPC分类号： C21D10/005 ,  Y10T428/31

摘要： A method for laser shock peening an article includes laser shock peening the article forming at least one pre-stressed region having deep compressive residual stresses imparted by the laser shock peening and machining a feature into article in the pre-stressed region after the laser shock peening. The feature may be machined entirely in the pre-stressed region. The pre-stressed region may extend completely between oppositely spaced apart sides of the article with the feature machined entirely through the pre-stressed region and completely between and through the spaced apart outer and inner sides. The feature may be a hole or a scallop. The article may be an arcuate wall having a radius of curvature and the feature includes a centerline and is machined into wall with the centerline substantially parallel to the radius of curvature. The hole or scallop may have a curved sharp edge.

摘要翻译： 用于激光冲击硬化物品的方法包括激光冲击喷丸处理，其形成至少一个具有由激光冲击硬化赋予的深度压缩残余应力的预应力区域，并且在激光冲击喷丸处理之后将特征加工成预应力区域中的制品 。 该特征可以完全在预应力区域中加工。 预应力区域可以在物品的相对间隔开的侧面之间完全延伸，其特征是完全通过预应力区域加工，并且完全在间隔开的外侧和内侧之间并通过间隔开的外侧和内侧。 该特征可以是孔或扇贝。 制品可以是具有曲率半径的弓形壁，并且该特征包括中心线并且被加工成壁，其中心线基本上平行于曲率半径。 孔或扇贝可能具有弯曲的锋利边缘。

公开(公告)号：US07304266B2

公开(公告)日：2007-12-04

申请号：US11008702

申请日：2004-12-09

申请人： Seetha Ramaiah Mannava ,  William Dewaine Cowie

发明人： Seetha Ramaiah Mannava ,  William Dewaine Cowie

IPC分类号： B23K26/00 ,  B23K26/02

CPC分类号： F01D5/288 ,  C21D10/005 ,  F01D5/286 ,  F05D2230/90 ,  F05D2300/611 ,  Y02T50/673 ,  Y10T428/28

摘要： An integrated laser shock peening coating includes film or a tape having an ablative medium layer spaced apart from a clear containment layer and a stationary clear liquid confining medium therebetween wherein the clear transparent to a laser beam used for laser shock peening. Two examples of the clear liquid confining medium are water and a mixture of water and agar without flowing a confinement curtain of fluid over the surface upon which the laser beam is firing. The intergrated laser shock peening coating may be a tape with an adesive layer being disposed on a first side ablative medium layer. A method of laser shock peening includes coating a substrate of an article with the intergrated laser shock peening coating and firing a laser beam on the coated substrate with sufficient power to form a region having deep compressive residual stresses extending into the substrate.

摘要翻译： 集成的激光冲击硬化涂层包括具有与透明容纳层隔开的烧蚀介质层和其间的固定透明液体限制介质的膜或带，其中对于用于激光冲击硬化的激光束透明。 透明液体限制介质的两个实例是水和水和琼脂的混合物，而不会在激光束在其上发射的表面上流动流体的限制帘。 集成的激光冲击硬化涂层可以是具有在第一侧烧蚀介质层上设置有粘附层的带。 激光冲击硬化的方法包括用集成的激光冲击喷丸涂层涂覆制品的基底，并且在足够的功率下在激光束上涂覆激光束，以形成具有延伸到基底中的深的压缩残余应力的区域。

公开(公告)号：US07097720B2

公开(公告)日：2006-08-29

申请号：US10426816

申请日：2003-04-30

申请人： Seetha Ramaiah Mannava ,  Todd Jay Rockstroh ,  William Woodrow Shepherd ,  Ian Francis Prentice ,  Thomas Froats Broderick

发明人： Seetha Ramaiah Mannava ,  Todd Jay Rockstroh ,  William Woodrow Shepherd ,  Ian Francis Prentice ,  Thomas Froats Broderick

IPC分类号： C21D1/04 ,  C21D1/09 ,  C21D1/10

CPC分类号： F01D5/286 ,  C21D10/005

摘要： A method for laser shock peening an article including laser shock peening a first area with at least one high fluence laser beam and laser shock peening a border area between the first area and a non-laser shock peened area of the article with at least one first low fluence laser beam. The border area may be laser shock peened with a second low fluence laser beam or more low fluence laser beams wherein the second low fluence laser beam and others have a lower fluence than the first low fluence laser beam. The border area may be laser shock peened with progressively lower fluence laser beams starting with the one first fluence laser beam wherein the progressively lower fluence laser beams are in order of greatest fluence to least fluence in a direction outwardly from the first area through the border area to the non-laser shock peened area.

摘要翻译： 一种用于激光冲击硬化处理物品的方法，所述方法包括用至少一个高注量激光束激光冲击第一区域的激光冲击，以及用所述第一区域和所述第一区域和所述第一区域之间的至少一个第一区域激光冲击所述第一区域和所述制品的非激光冲击硬化区域之间的边界区域 低能量激光束。 边界区域可以是用第二低注量激光束或更低的能量密度激光束进行激光冲击喷丸，其中第二低注量激光束和其它激光束具有比第一低注量激光束更低的能量密度。 边界区域可以是激光冲击喷丸，其中以一个第一注量激光束开始逐渐降低的注量激光束，其中逐渐更低的注量激光束按照最小注量的顺序，在从第一区域通过边界区域向外的方向上的最小注量 到非激光冲击硬化区域。

公开(公告)号：US06677037B1

公开(公告)日：2004-01-13

申请号：US09660967

申请日：2000-09-13

申请人： Mark Lloyd Miller ,  Farzin Homayoun Azad ,  Seetha Ramaiah Mannava ,  Philemon Kennard Wright, III

发明人： Mark Lloyd Miller ,  Farzin Homayoun Azad ,  Seetha Ramaiah Mannava ,  Philemon Kennard Wright, III

IPC分类号： C21D109

CPC分类号： C21D10/005 ,  Y10S148/902 ,  Y10T428/2809 ,  Y10T428/2857 ,  Y10T428/31692 ,  Y10T428/31909

摘要： An ablative tape is applied onto a substrate surface. The ablative tape comprises an ablative medium comprising a polymer and dispersed metallic component. The tape is then irradiated to ablate the ablative medium. An article comprises a substrate and the ablative tape applied to the substrate.

摘要翻译： 将烧烤带施加到基底表面上。 烧烤带包括包含聚合物和分散的金属组分的烧蚀介质。 然后照射胶带以烧蚀烧蚀介质。 一种制品包括基材和施加到基材上的烧烤带。

公开(公告)号：US20100249926A1

公开(公告)日：2010-09-30

申请号：US12557577

申请日：2009-09-11

申请人： David Louis Kirschman ,  Seetha Ramaiah Mannava ,  Vijay K. Vasudevan

发明人： David Louis Kirschman ,  Seetha Ramaiah Mannava ,  Vijay K. Vasudevan

IPC分类号： A61F2/02 ,  A61B17/86 ,  B23K26/00

CPC分类号： A61B17/866 ,  A61B17/7002 ,  A61B17/7004 ,  A61F2/30767 ,  A61F2002/30922 ,  A61F2002/3097

摘要： A medical or orthopedic implant, system and method for making the implant having areas that are designed to optimize compressive stress processing by, for example, laser shock peening. The implant is designed by identifying stress areas as processing zones. The processing zones are machined, processed or adapted to have a desired shape or configuration to optimize compression. The processed zones or areas are compressive stressed processed to have a higher density at zones or areas compared to areas that are not compressive stress processed. The implant is finished processed and sterilized and ready for use in the patient.

摘要翻译： 用于制造植入物的医疗或矫形植入物，系统和方法具有被设计成通过例如激光冲击硬化来优化压应力处理的区域。 通过将应力区域识别为加工区域来设计植入物。 加工区域被加工，加工或适于具有期望的形状或构造以优化压缩。 经处理的区域或区域被压缩应力处理以在区域或区域具有比没有压缩应力处理的区域更高的密度。 植入物被完成加工和灭菌并准备用于患者。

公开(公告)号：US07217102B2

公开(公告)日：2007-05-15

申请号：US11171147

申请日：2005-06-30

申请人： Todd Jay Rockstroh ,  Roger Owen Barbe ,  Seetha Ramaiah Mannava

发明人： Todd Jay Rockstroh ,  Roger Owen Barbe ,  Seetha Ramaiah Mannava

IPC分类号： F01D5/14

CPC分类号： F01D5/286 ,  B24C1/10 ,  Y02T50/673 ,  Y10T29/4932

摘要： A gas turbine engine blade is laser shock peened by laser shock peening a thin airfoil of the blade, forming a laser shock induced twist in the airfoil, and shot peening a portion of the airfoil to counter the laser shock induced twist in the airfoil. The shot peening may be performed before or after the laser shock peening. The shot peening may be applied over a laser shock peened surface formed by the laser shock peening. The shot peening may be performed asymmetrically on asymmetrically shot peened pressure and suction side areas of pressure and suction sides, respectively, of the airfoil. A shot peened patch near a blade tip may be formed on one of pressure and suction sides of the airfoil wherein the airfoil extends radially outwardly from a blade platform to the blade tip of the blade.

公开(公告)号：US20090313823A1

公开(公告)日：2009-12-24

申请号：US12144940

申请日：2008-06-24

申请人： Todd Jay Rockstroh ,  Seetha Ramaiah Mannava ,  Roger Owen Barbe

发明人： Todd Jay Rockstroh ,  Seetha Ramaiah Mannava ,  Roger Owen Barbe

IPC分类号： B23P6/00

CPC分类号： B23P9/02 ,  B23P6/007 ,  B23P9/04 ,  C21D7/06 ,  C21D9/0068 ,  C21D10/005 ,  C21D2221/00 ,  F01D5/005 ,  F01D5/286 ,  F05D2230/10 ,  F05D2230/232 ,  F05D2230/90 ,  Y02T50/672 ,  Y02T50/673 ,  Y10T29/49318

摘要： A gas turbine engine airfoil is repaired by machining away airfoil material along at least a portion of at least one of leading and trailing edges and a radially outer tip forming at least one cut-back area and forming a weldment by welding successive beads of welding material into the cut-back area. Desired finished dimensions of the repaired airfoil are obtained by machining away some of the weld bead material in the weldment and then deep compressive residual stresses are imparted in a pre-stressed region extending into and encompassing the weldment and a portion of the airfoil adjacent the weldment. The compressive residual stresses may be are imparted after either rough machining or final finishing thereafter of the weldment. The cut-back area may extend up to about 90% of the airfoil's span and have a maximum cut-back depth up to about 0.22 inches.

摘要翻译： 燃气涡轮发动机翼型件通过沿着前缘和后缘中的至少一个的至少一部分加工掉翼型材料和形成至少一个切割区域的径向外部尖端进行修复，并通过焊接连续的焊接材料珠形成焊件 进入切割区域。 修理的翼型件的期望成品尺寸通过机械加工焊接件中的一些焊缝材料而获得，然后在延伸到焊接件中并包围焊件的预应力区域中施加深度的压缩残余应力，并且靠近焊件的翼型件的一部分 。 可以在焊接后的粗加工或最终精加工之后赋予压缩残余应力。 切割区域可以延伸至翼型跨度的大约90％，并且具有最大约为0.22英寸的切割深度。

公开(公告)号：US07204677B2

公开(公告)日：2007-04-17

申请号：US11171087

申请日：2005-06-30

申请人： Seetha Ramaiah Mannava ,  Todd Jay Rockstroh ,  Roger Owen Barbe

发明人： Seetha Ramaiah Mannava ,  Todd Jay Rockstroh ,  Roger Owen Barbe

IPC分类号： F01D5/14

CPC分类号： F01D5/286 ,  C21D7/06 ,  C21D10/005 ,  F01D5/141 ,  F01D5/3038 ,  F05D2230/41 ,  Y02T50/673

摘要： A method for laser shock peening a gas turbine engine blade includes laser shock peening a thin airfoil of the blade, forming a laser shock induced twist in the airfoil, and altering a root of the blade to counter the laser shock induced twist in the airfoil. The altering may be done after the laser shock peening. The altering may be done before the laser shock peening during casting or forging of the blade or during a machining or broaching procedure which cuts a shape of the root. One embodiment of the altering includes forming the root with an altered root centerline having an altered centerline angle with respect to a predetermined root centerline designed for a non-laser shock peened airfoil of the blade.

摘要翻译： 一种用于激光冲击喷丸机的燃气涡轮发动机叶片的方法包括激光冲击喷丸刀片的薄翼型，在翼型中形成激光冲击引起的扭曲，以及改变叶片的根部以抵抗机翼中的激光冲击引起的扭曲。 可以在激光冲击硬化后进行更换。 在刀片的铸造或锻造期间或在切割根部的形状的加工或拉削过程期间，可以在激光冲击锤击之前进行改变。 改变的一个实施例包括形成具有相对于为刀片的非激光冲击喷丸翼型设计的预定根中心线具有改变的中心线角的改变的根中心线的根部。

公开(公告)号：US06503574B1

公开(公告)日：2003-01-07

申请号：US08362050

申请日：1994-12-22

申请人： David William Skelly ,  Bangalore Aswatha Nagaraj ,  David John Wortman ,  David Vincent Rigney ,  Seetha Ramaiah Mannava ,  Rudolfo Viguie ,  Robert William Bruce ,  Warren Arthur Nelson ,  Curtis Alan Johnson ,  Bhupendra Kumar Gupta

发明人： David William Skelly ,  Bangalore Aswatha Nagaraj ,  David John Wortman ,  David Vincent Rigney ,  Seetha Ramaiah Mannava ,  Rudolfo Viguie ,  Robert William Bruce ,  Warren Arthur Nelson ,  Curtis Alan Johnson ,  Bhupendra Kumar Gupta

IPC分类号： B32B904

CPC分类号： F01D5/288 ,  C23C4/02 ,  Y02T50/67 ,  Y02T50/671 ,  Y10T428/12472 ,  Y10T428/12611 ,  Y10T428/12618 ,  Y10T428/12993 ,  Y10T428/24521 ,  Y10T428/24545 ,  Y10T428/24612

摘要： An article having a substrate is protected by a thermal barrier coating system. An interfacial layer contacts the upper surface of the substrate. The interfacial layer may comprise a bond coat only, or a bond coat and an overlay coat. The interfacial layer has on its upper surface a preselected, controllable pattern of three-dimensional features, such as grooves in a parallel array or in two angularly offset arrays. The features are formed by an ablation process using an ultraviolet laser such as an excimer laser. A ceramic thermal barrier coating is deposited over the pattern of features on the upper surface of the interfacial layer.

摘要翻译： 具有基底的制品由热障涂层系统保护。 界面层接触基板的上表面。 界面层可以仅包含粘结层，或者粘合涂层和覆盖层。 界面层在其上表面上具有三维特征的预选的可控模式，例如平行排列的凹槽或两个角度偏移的阵列。 特征通过使用诸如准分子激光器的紫外激光的消融处理形成。 陶瓷热障涂层沉积在界面层上表面上的特征图案上。