公开(公告)号：US07138020B2

公开(公告)日：2006-11-21

申请号：US10685640

申请日：2003-10-15

Applicant: Jon Raymond Groh ,  Shesh Krishna Srivatsa

Inventor： Jon Raymond Groh ,  Shesh Krishna Srivatsa

IPC: C12D11/00 ,  C22F1/10

CPC classification number: C22F1/10

Abstract: In accordance with an embodiment of the present invention, a method for reducing residual stress in a nickel-base superalloy article comprising about 40–70% of gamma prime phase and having a gamma prime solvus temperature is disclosed. The method comprises the steps of super-solvus heat treating the superalloy article about 5–40° F. (3–22° C.) above the gamma prime solvus temperature; and holding at the super-solvus heat treatment temperature for about 0.25–2 hours, wherein the heat-treated superalloy article has reduced residual stress.

Abstract translation: 根据本发明的一个实施方案，公开了一种减少镍基超级合金制品中残留应力的方法，该方法包括约40-70％的γ原相并具有γ'固溶体温度。 该方法包括以下步骤：将超合金制品在伽马质子溶质温度以上约5-40°F（3-22℃）进行超溶剂热处理; 并在超溶剂热处理温度下保持约0.25-2小时，其中热处理的超合金制品具有降低的残余应力。

公开(公告)号：US06932877B2

公开(公告)日：2005-08-23

申请号：US10286579

申请日：2002-10-31

Applicant: Edward Lee Raymond ,  Richard Gordon Menzies ,  Terrence Owen Dyer ,  Barbara Ann Link ,  Richard Frederick Halter ,  Mike Eugene Mechley ,  Francis Mario Visalli ,  Shesh Krishna Srivatsa

Inventor： Edward Lee Raymond ,  Richard Gordon Menzies ,  Terrence Owen Dyer ,  Barbara Ann Link ,  Richard Frederick Halter ,  Mike Eugene Mechley ,  Francis Mario Visalli ,  Shesh Krishna Srivatsa

IPC: C22F1/10 ,  B21J1/06 ,  B21J5/00 ,  C22C20060101 ,  C22C19/03 ,  C22C19/05

CPC classification number: C22F1/10 ,  B21J1/06 ,  B21J5/00

Abstract: A forging blank of a forging nickel-base superalloy is forged in a forging press having forging dies made of a die nickel-base superalloy. The forging is accomplished by heating the forging blank to a forging-blank starting temperature of from about 1850° F. to about 1950° F., heating the forging dies to a forging-die starting temperature of from about 1500° F. to about 1750° F., placing the forging blank into the forging press and between the forging dies, and forging the forging blank at the forging-blank starting temperature using the forging dies at the forging-die starting temperature, to produce a forging.

Abstract translation: 在具有由模具镍基超合金制成的锻造模具的锻压机中锻造锻造镍基超级合金的锻造坯料。 通过将锻造坯料加热至约1850°F至约1950°F的锻坯坯料起始温度来实现锻造，将锻造模具加热至约1500°F的锻模开始温度至约 将锻造坯料放置在锻压机中和锻造模具之间，并使用锻造模具在锻模开始温度下以锻造坯料起始温度锻造锻造坯料，以制造锻造。

公开(公告)号：US07763129B2

公开(公告)日：2010-07-27

申请号：US11379203

申请日：2006-04-18

Applicant: David Paul Mourer ,  Brian Francis Mickle ,  Shesh Krishna Srivatsa ,  Eric Scott Huron ,  Jon Raymond Groh ,  Kenneth Rees Bain

Inventor： David Paul Mourer ,  Brian Francis Mickle ,  Shesh Krishna Srivatsa ,  Eric Scott Huron ,  Jon Raymond Groh ,  Kenneth Rees Bain

IPC: C22F1/10

CPC classification number: C22F1/10 ,  C22C19/056 ,  C22C19/057

Abstract: A method of forming a component from a gamma-prime precipitation-strengthened nickel-base superalloy so that, following a supersolvus heat treatment the component characterized by a uniformly-sized grain microstructure. The method includes forming a billet having a sufficiently fine grain size to achieve superplasticity of the superalloy during a subsequent working step. The billet is then worked at a temperature below the gamma-prime solvus temperature of the superalloy so as to form a worked article, wherein the billet is worked so as to maintain strain rates above a lower strain rate limit to control average grain size and below an upper strain rate limit to avoid critical grain growth. Thereafter, the worked article is heat treated at a temperature above the gamma-prime solvus temperature of the superalloy for a duration sufficient to uniformly coarsen the grains of the worked article, after which the worked article is cooled at a rate sufficient to reprecipitate gamma-prime within the worked article.

Abstract translation: 一种从γ-Q析出强化的镍基超级合金形成组分的方法，使得在超溶解热处理之后，其特征在于均匀尺寸的晶粒微结构。 该方法包括形成具有足够细的晶粒尺寸的坯料，以在随后的工作步骤中实现超级合金的超塑性。 然后将坯料在低于超合金的γ'固溶温度的温度下加工，以形成加工制品，其中加工坯料以使应变速率保持在较低的应变速率极限以上以控制平均晶粒尺寸和低于 上限应变速率限制，以避免临界晶粒生长。 此后，将加工制品在高于合金的γ'溶解温度的温度下进行热处理，持续时间足以使加工制品的颗粒均匀地粗化，之后将加工制品以足以再沉淀γ- 在工作文章中。

公开(公告)号：US06935187B1

公开(公告)日：2005-08-30

申请号：US10792158

申请日：2004-03-03

Applicant: Mark Daniel Gorman ,  Shesh Krishna Srivatsa ,  Philemon Kennard Wright, III ,  Christine Govern

Inventor： Mark Daniel Gorman ,  Shesh Krishna Srivatsa ,  Philemon Kennard Wright, III ,  Christine Govern

IPC: G01N3/00 ,  G01N3/02 ,  G01N3/32

CPC classification number: G01N3/32 ,  G01N2203/0005 ,  G01N2203/0057 ,  G01N2203/0073 ,  G01N2203/0224 ,  G01N2203/0262

Abstract: A test method for testing the thermal mechanical fatigue performance of a test material includes preparing a test specimen of the test material, wherein the test specimen has a base, and a rib extending outwardly from the base. The test specimen is thermally cycled through at least one test cycle. In each test cycle the rib is heated to a higher rib temperature and thereafter cooled to a lower rib temperature. The test specimen is evaluated for thermal mechanical fatigue damage.

Abstract translation: 用于测试测试材料的热机械疲劳性能的测试方法包括制备测试材料的测试样本，其中测试样本具有基部和从基部向外延伸的肋。 试样通过至少一个试验循环热循环。 在每个测试循环中，将肋加热到较高的肋温度，然后冷却至较低的肋温度。 评估试样的热机械疲劳损伤。

公开(公告)号：US06908519B2

公开(公告)日：2005-06-21

申请号：US10199186

申请日：2002-07-19

Applicant: Edward Lee Raymond ,  Shesh Krishna Srivatsa

Inventor： Edward Lee Raymond ,  Shesh Krishna Srivatsa

IPC: B21J5/02 ,  C22C19/05 ,  C22F1/10 ,  C22C1/10

CPC classification number: C22F1/10 ,  C22C19/056

Abstract: A superalloy made of a forging nickel-base superalloy such as Rene™ 88DT or ME3 is forged in a forging press having forging dies made of a die nickel-base superalloy. The forging is accomplished by heating to a forging temperature of from about 1700° F. to about 1850° F., and forging at that forging temperature and at a nominal strain rate. The die nickel-base superalloy is selected to have a creep strength of not less than a flow stress of the forging nickel-base superalloy at the forging temperature and strain rate.

Abstract translation: 在具有由模具镍基超合金制成的锻造模具的锻压机中锻造由锻造镍基超级合金如Rene TM 88DT或ME3制成的超合金。 锻造通过加热至约1700°F至约1850°F的锻造温度并在该锻造温度和标称应变速率下锻造来实现。 选择模具镍基超级合金在锻造温度和应变速率下具有不小于锻造镍基超级合金的流动应力的蠕变强度。

公开(公告)号：US06652226B2

公开(公告)日：2003-11-25

申请号：US09783277

申请日：2001-02-09

Applicant: Richard William Albrecht, Jr. ,  Joseph Charles Kulesa ,  Robert Paul Czachor ,  Shesh Krishna Srivatsa ,  Daniel Edward Wines ,  Thomas Tracy Wallace

Inventor： Richard William Albrecht, Jr. ,  Joseph Charles Kulesa ,  Robert Paul Czachor ,  Shesh Krishna Srivatsa ,  Daniel Edward Wines ,  Thomas Tracy Wallace

IPC: F01D1112

CPC classification number: F01D11/127 ,  F01D5/225 ,  F16J15/444 ,  Y02T50/672

Abstract: A gas turbine engine includes a non-rotatable member that includes a honeycomb seal that reduces wear to rotor seal teeth disposed within the gas turbine engine. The gas turbine engine also includes a rotatable annular member including a sealing assembly disposed between rotor and stator components. The rotatable annular member includes seal teeth that extend radially outward from the rotatable annular member. The stator components include a non-rotatable member that includes a honeycomb seal that extends radially inward. The honeycomb seal is fabricated from a material that has a melting temperature less than approximately 2000° F.

公开(公告)号：US07033448B2

公开(公告)日：2006-04-25

申请号：US10662586

申请日：2003-09-15

Applicant: Jon Raymond Groh ,  Edward Lee Raymond ,  Shesh Krishna Srivatsa

Inventor： Jon Raymond Groh ,  Edward Lee Raymond ,  Shesh Krishna Srivatsa

IPC: C22C1/10

CPC classification number: C22F1/10

Abstract: An article made of a nickel-base superalloy strengthened by the presence of a gamma-prime phase is prepared by solution heat treating the nickel-base superalloy at a solutionizing temperature above a gamma-prime solvus temperature of the nickel-base superalloy, thereafter first quenching the nickel-base superalloy in a first molten salt bath maintained at a temperature of from the gamma-prime solvus temperature to about 100° F. below the gamma-prime solvus temperature, thereafter second quenching the nickel-base superalloy in a second molten salt bath maintained at a temperature below an aging temperature of the nickel-base superalloy, and thereafter precipitation heat treating the nickel-base superalloy at the aging temperature to precipitate an aged microstructure having gamma prime phase in a nickel-base matrix.

Abstract translation: 通过在γ-基相存在下强化的镍基超级合金制成的制品是通过在高于镍基超级合金的γ'固溶温度的溶解温度下对镍基超级合金进行固溶热处理，之后首先 将镍基超级合金淬火在保持在伽马提取溶剂温度至约100°F的温度下的第一熔融盐浴中，低于伽马提取溶质温度，然后在第二次熔融 盐浴保持在低于镍基超级合金的老化温度的温度下，然后在老化温度下对镍基超级合金进行沉淀热处理，以沉淀在镍基基质中具有γ'相的老化微结构。

公开(公告)号：US06909988B2

公开(公告)日：2005-06-21

申请号：US10270472

申请日：2002-10-15

Applicant: Thomas James Batzinger ,  Michael Francis Xavier Gigliotti, Jr. ,  Bernard Patrick Bewlay ,  Shesh Krishna Srivatsa

Inventor： Thomas James Batzinger ,  Michael Francis Xavier Gigliotti, Jr. ,  Bernard Patrick Bewlay ,  Shesh Krishna Srivatsa

IPC: B21C51/00 ,  B21J1/02 ,  B21J5/00 ,  B24B19/00

CPC classification number: B21J5/00 ,  B21C51/00 ,  B21J1/02 ,  B21J1/025

Abstract: A process for positioning at least one defect in a billet being forged into an article is described. The size and location of the billet is first determined, using a non-destructive test such as ultrasonic inspection. The movement of the defect under selected forging conditions is then predicted, using a finite element analysis model. The billet can then be positioned and forged under conditions which cause the defect to move to a non-critical area of the article. In this manner, a billet which might otherwise be discarded or set aside can often be retained for a useful purpose. Related articles are also described.

Abstract translation: 描述了将锻造在制品中的坯料中的至少一个缺陷定位的方法。 首先确定坯料的尺寸和位置，使用超声波检测等非破坏性试验。 然后使用有限元分析模型预测缺陷在选定锻造条件下的移动。 然后可以在导致缺陷移动到制品的非关键区域的条件下将坯料定位和锻造。 以这种方式，否则可能会丢弃或搁置的坯料用于有用的目的。 还描述了相关文章。