公开(公告)号：US06550302B1

公开(公告)日：2003-04-22

申请号：US09625426

申请日：2000-07-25

Applicant: Amit K. Ghosh

Inventor： Amit K. Ghosh

IPC: B21D3716

CPC classification number: B21D22/00 ,  B21D37/16 ,  C22F1/04

Abstract: In metal stamping dies, by taking advantage of improved material flow by selectively warming the die, flat sections of the die can contribute to the flow of material throughout the workpiece. Local surface heating can be accomplished by placing a heating block in the die. Distribution of heating at the flat lower train central regions outside of the bend region allows a softer flow at a lower stress to enable material flow into the thinner, higher strain areas at the bend/s. The heating block is inserted into the die and is powered by a power supply.

Abstract translation: 在金属冲压模具中，通过利用改进的材料流动来选择性地加热模具，模具的平坦部分可以有助于材料在整个工件上的流动。 可以通过将加热块放置在模具中来实现局部表面加热。 在弯曲区域外的平的下列火车中心区域处的加热分布允许在较低应力下的较软的流动使得材料能够在弯曲/ s处进入较薄的较高应变区域。 将加热块插入模具中并由电源供电。

公开(公告)号：US4799974A

公开(公告)日：1989-01-24

申请号：US54558

申请日：1987-05-27

Applicant: Murray W. Mahoney ,  Amit K. Ghosh

Inventor： Murray W. Mahoney ,  Amit K. Ghosh

IPC: C21D7/06 ,  C22F1/04

CPC classification number: C22F1/04 ,  C21D7/06

Abstract: An aluminum alloy is provided which has a surface with a fine grain structure. It is produced by overaging an aluminum alloy and then cold working only the surface by shot peening or other surface working technique. The alloy is then heated so that the overaged, cold-worked surface recrystallizes into a fine grain structure.

Abstract translation: 提供具有细晶粒结构的表面的铝合金。 它是通过超化铝合金制成的，然后通过喷丸硬化或其他表面加工技术仅对表面进行冷加工。 然后加热合金，使得过度的冷加工表面再结晶成细晶粒结构。

公开(公告)号：US4770848A

公开(公告)日：1988-09-13

申请号：US85690

申请日：1987-08-17

Applicant: Amit K. Ghosh ,  Chimata Gandhi

Inventor： Amit K. Ghosh ,  Chimata Gandhi

IPC: C22C1/04 ,  C22C21/10 ,  C22F1/053 ,  B22F3/14

CPC classification number: C22C1/0416 ,  C22C21/10 ,  C22F1/053 ,  Y10S420/902

Abstract: A rapidly-solidified aluminum alloy powder having a nominal composition of 7% Zn, 2.5% Mg, 2% Cu, 0.3% Zr, and 0.3% Cr is used to make a high forming-rate, superplastic, high-strength aluminum alloy. The powder is outgassed, consolidated, and extruded, thereby developing a wide range of particle size distribution of dispersoids in the process, containing respectively zirconium and chromium dispersoids, as well as age hardening precipitates. The consolidated powder is then rolled to 85% reduction to provide a sheet material which is superplastically formed at a temperature in the range of 450.degree. C. to 490.degree. C. and at a rate between 5.times.10.sup.-3 to 5.times.10.sup.-2 per second.

Abstract translation: 使用标称组成为7％Zn，2.5％Mg，2％Cu，0.3％Zr和0.3％Cr的快速固化的铝合金粉末，以制备高成型率，超塑性，高强度铝合金。 粉末被除气，固化和挤出，从而在该过程中分散含有各种锆和铬分散体的分散体的粒度分布以及时效硬化沉淀物。 然后将固结粉末轧制至85％还原，以提供在450℃至490℃的温度范围内以5×10 -3至5×10 -2 /秒的速率超塑性形成的片材。

公开(公告)号：US4352280A

公开(公告)日：1982-10-05

申请号：US150472

申请日：1980-05-16

Applicant: Amit K. Ghosh

Inventor： Amit K. Ghosh

IPC: B21D26/021 ,  B21D26/059 ,  B21B9/00

CPC classification number: B21D26/021 ,  B21D26/059

Abstract: A sheet of material is held in a die opposite a forming surface of the die, and gas pressure is applied to both sides of the sheet. The pressure creates a compressive stress in the sheet thickness direction sufficient to cause plastic flow. By maintaining the pressure higher on the side of the sheet opposite to the forming surface, the sheet bends and expands toward the die forming surface. This pressure differential can be increased as necessary to bend the sheet into the crevices which make up the details of the forming surface. The sheet may be heated during forming to lower the compressive stress which is required to cause it to flow plastically.

Abstract translation: 将一片材料保持在与模具的成形表面相对的模具中，并且将气体压力施加到片材的两侧。 压力在板厚度方向上产生足够的塑性流动的压缩应力。 通过将片材的与成形面相对的一侧的压力保持较高，片材向模具形成面弯曲并膨胀。 可以根据需要增加该压力差，以将片材弯曲成构成成形表面的细节的缝隙。 片材可以在成形期间被加热以降低使其塑性流动所需的压缩应力。

公开(公告)号：US5346184A

公开(公告)日：1994-09-13

申请号：US62896

申请日：1993-05-18

Applicant: Amit K. Ghosh

Inventor： Amit K. Ghosh

IPC: B22D27/08 ,  B23K15/00 ,  B22D23/00

CPC classification number: B22D27/08

Abstract: An apparatus and method for producing a rapidly solidified ingot characterized by a fine scale microstructure capable of precipitating uniformly dispersed fine particles. A charge of the material is placed in a crucible and heated by a furnace to melt the charge. The melt is discharged from the crucible in a stream along a pouring axis. An ingot mold is oriented at an angle with respect to the pouring axis so that the stream is received in the mold. As the melt is being poured into the mold, the mold is rotated about its central axis at a predetermined speed to continuously shear, both circumferentially and downwardly, a thin layer of the melt from the stream as the stream contacts the sidewall surfaces of the mold. The thin layer is rapidly solidified by the extraction of heat through the mold and is formed, as said ingot mold fills and successive layers are solidified, into an ingot having a fine microstructure capable of developing uniformly dispersed fine particles.

Abstract translation: 一种用于生产快速固化锭的装置和方法，其特征在于能够使均匀分散的细颗粒沉淀的微细尺度微结构。 将材料的装料放置在坩埚中并通过炉子加热以熔化电荷。 熔体沿着倾倒轴从坩埚中排出。 铸锭模具相对于倾倒轴线成一定角度定向，从而将流体接收在模具中。 当熔体被浇注到模具中时，模具以预定的速度围绕其中心轴线旋转，以便当流体接触模具的侧壁表面时，沿着周向和向下的方式连续地剪切来自流体的熔体的薄层 。 通过将模具中的热量提取而使薄层快速固化，并且当所述铸锭模具填充并连续的层固化时，形成具有能够显影均匀分散的细颗粒的精细微结构的锭料。

公开(公告)号：US5322740A

公开(公告)日：1994-06-21

申请号：US734428

申请日：1985-05-16

Applicant: Amit K. Ghosh

Inventor： Amit K. Ghosh

IPC: B23K20/02 ,  B23K20/16 ,  B23K35/00 ,  B23K35/02 ,  B32B15/01

CPC classification number: B23K35/02 ,  B23K20/023 ,  B23K20/16 ,  B23K35/002 ,  Y10T428/12729

Abstract: A solid state joint and a method of making a solid state joint between aluminum or magnesium alloys is provided. The joint consists of a diffusion bond with unmelted pieces of a fragmented foil dispersed along the diffusion bond. The joint is made by placing a friable foil between the parts being joined and pressing the parts together to crack the foil. The assembly is then heated and pressed together for a sufficient time, temperature, and pressure to cause the aluminum or magnesium alloy to flow into the cracks, across the foil, and then to diffusion bond together. The foil is made from a material which is harder than the alloy being joined and which will not melt at the bonding temperature.

Abstract translation: 提供固态接头和在铝或镁合金之间制作固态接头的方法。 该接头由扩散键与沿着扩散键分散的片状箔的未熔化片组成。 通过在被接合的部件之间放置脆性箔并将部件压在一起以裂开箔片来进行接合。 然后将组件加热并压在一起足够的时间，温度和压力，以使铝或镁合金流过穿过箔的裂纹，然后一起扩散粘合。 箔由比接合的合金硬的材料制成，并且在接合温度下不会熔化。

公开(公告)号：US4721537A

公开(公告)日：1988-01-26

申请号：US787201

申请日：1985-10-15

Applicant: Amit K. Ghosh

Inventor： Amit K. Ghosh

IPC: B21J5/00 ,  C22F1/04 ,  C22F1/053

CPC classification number: B21J1/025 ,  C22F1/04 ,  C22F1/053 ,  Y10S420/902

Abstract: A method is provided for imparting a very fine grain size to aluminum alloys, including alloys in the form of sheet or heavy sections such as forging billets. The alloy is first aged to form precipitates. The aged alloy is then deformed along its three principal axes in successive operations until a cummulative true strain of at least 8 is achieved.

Abstract translation: 提供了一种赋予铝合金非常细的晶粒尺寸的方法，包括片状或重部分形式的合金，例如锻造坯料。 该合金首先老化形成析出物。 然后，老化的合金沿着其三个主轴在连续的操作中变形，直到达到至少8的累积真应变为止。

公开(公告)号：US06585151B1

公开(公告)日：2003-07-01

申请号：US09577176

申请日：2000-05-23

Applicant: Amit K. Ghosh

Inventor： Amit K. Ghosh

IPC: B23K3102

CPC classification number: B21J5/00 ,  B21F33/00 ,  B21J1/003 ,  F42D5/045 ,  H01M8/0656

Abstract: A method for producing microporous objects with fiber, wire or foil core with periodic welding of nodes by movement of the substrate and the making of a porous mat. Microporous objects are created by deposition of small dimension of solid from liquid streams undergoing solidification with the simultaneous welding of the streams at various nodal locations concurrently during the deposition process. Bulk porous material objects are created containing open spaces within the microstructure. Inserts can be added to create internal geometries. Variations in pore density from near-zero to about 95% with gradient densities can be created. Screens can be used for forming column-like supports within the microporous object. Holes can be punched in the fiber core to create desired properties of denser regions and to limit the thermal expansion of the mat in a single direction. The initial heat contact of the liquid metal is used to create the shape of the deposited segments as well as to remelt immediately deposited solid for in-situ welding. No additional heat source is employed to weld and create the network structure.

Abstract translation: 一种用纤维，线或箔芯生产微孔物体的方法，其中通过衬底的运动和多孔垫的制造对节点进行周期性焊接。 微孔物体是通过在沉积过程中同时焊接各种节点位置处的各个点处的同时焊接的液体流中固体的小尺寸的固体而形成的。 大量多孔材料物体被创建为在微结构内含有开放空间。 可以添加插入以创建内部几何。 可以产生具有梯度密度的从近零到约95％的孔密度的变化。 筛子可用于在微孔物体内形成柱状载体。 孔可以在纤维芯中冲压以产生更致密区域的所需性质并且限制垫在单个方向上的热膨胀。 液态金属的初始热接触用于产生沉积段的形状，并且重新熔化立即沉积的固体用于原位焊接。 不需要额外的热源来焊接和创建网络结构。

公开(公告)号：US5326525A

公开(公告)日：1994-07-05

申请号：US217253

申请日：1988-07-11

Applicant: Amit K. Ghosh

Inventor： Amit K. Ghosh

IPC: C22C47/20 ,  C22C49/04 ,  B22F3/14

CPC classification number: C22C47/068 ,  C22C47/20 ,  C22C49/04 ,  Y10T428/12035 ,  Y10T428/12049 ,  Y10T428/12063

Abstract: A process is disclosed for fabricating a metal aluminide composite which comprises providing a metal aluminide, such as titanium aluminide, or a titanium aluminide alloy, and a reinforcing fiber material, such as silicon carbide fiber, and placing an interlayer or diffusion barrier layer in the form of a metal selected from the group consisting of silver, copper and gold, and alloys thereof, between the metal aluminide and the reinforcing fiber material. The interlayer metal can be a foil of the metal or in the form of a coating, such as a silver coating, on the reinforcing fiber material. The metal aluminide, the reinforcing fiber material, and the metal interlayer, e.g., in the form of a packet of a plurality of alternate layers of metal aluminide alloy and reinforcing fiber material, each layer being separated by the metal interlayer, is pressed and heated at an elevated temperature, e.g., ranging from about 900.degree. to about 1200.degree. C., at which diffusion bonding occurs. The diffusion barrier metal, e.g., silver, dissolves in the metal aluminide during consolidation of the metal aluminide matrix with the reinforcing fiber material. A layer of tantalum on silver can be employed as a second diffusion barrier layer, and a third layer, such as titanium alloy, can be applied over the tantalum layer, for increased effectiveness of the diffusion barrier, and preventing crack initiation.

Abstract translation: 公开了一种用于制造金属铝化合物复合材料的方法，该方法包括提供金属铝化物，例如铝化铝或钛铝化合物，以及增强纤维材料，例如碳化硅纤维，并将中间层或扩散阻挡层置于 在金属铝化物和增强纤维材料之间选自银，铜和金的金属及其合金的形式。 层间金属可以是增强纤维材料上的金属箔或涂层形式，如银涂层。 金属铝化物，增强纤维材料和金属中间层，例如以金属铝化物合金和增强纤维材料的多个交替层的包的形式，每层由金属中间层分离，被压制和加热 在高温下，例如在约900℃至约1200℃的范围内，发生扩散接合。 扩散阻挡金属（例如银）在金属铝化物基体与增强纤维材料的固结期间溶解在金属铝化物中。 可以使用银上的钽层作为第二扩散阻挡层，并且可以在钽层上施加第三层，例如钛合金，以增加扩散阻挡层的有效性，并防止裂纹发生。

公开(公告)号：US5007265A

公开(公告)日：1991-04-16

申请号：US285987

申请日：1988-12-19

Applicant: Murray W. Mahoney ,  Amit K. Ghosh

Inventor： Murray W. Mahoney ,  Amit K. Ghosh

IPC: B29C51/10 ,  B21D26/055 ,  B29C51/46 ,  G01L1/24 ,  G01N3/08

CPC classification number: B21D26/055 ,  B29C51/46 ,  G01L1/24 ,  G01N3/08 ,  Y10S72/709

Abstract: A monitor is provided for measuring and controlling the strain rate of a blank during forming. A light source directs light against the blank and a video camera is positioned and focused to view the light reflected from the blank while it is being formed. A video monitor and an image processor receive the signal from the camera. This signal is used to determine the strain rate based upon the dimensional change in reference marks on the blank. The image processor provides an output signal which can be used to control the strain rate in accordance with a predetermined strain rate profile for the particular part being formed.