Abstract:
A membrane actuator includes a magnetically actuatable membrane and a magnetic trigger. The membrane includes a shape memory alloy (SMA), and the magnetic trigger is configured to induce a martensitic transformation in the SMA, to produce a larger force than would be achievable with non-SMA-based materials. Such a membrane actuator can be beneficially incorporated into a wide variety of devices, including fluid pumps, shock absorbing systems, and synthetic jet producing devices for use in an aircraft. The membrane/diaphragm can be formed from a ferromagnetic SMA, or a ferromagnetic material can be coupled with an SMA such that the SMA and the ferromagnetic material move together. A hybrid magnetic trigger, including a permanent magnet and an electromagnet, is preferably used for the magnetic trigger, as hybrid magnetic triggers are easy to control, and produce larger magnetic gradients than permanent magnets or electromagnets alone.
Abstract:
The present invention employs an optimized cross-sectional shape for a ferromagnetic shape memory alloy (FSMA) composite that is used in a spring-type actuator, an improved hybrid magnetic trigger for use in FSMA based actuators, an a FSMA composite based spring type actuator, an a FSMA based spring type actuator including a stack of triggering units and FSMA springs, a FSMA composite based torque actuator. The invention also includes a model that can be employed to evaluate different materials being considered as components a FSMA for a FSMA composite used in either a FSMA based torque actuator or a FSMA spring actuator.
Abstract:
An aqueous phosphoric bonding solution consists essentially of phosphoric acid, a source of magnesium ions, and a leachable corrosion inhibitor. The bonding solution is stable with respect to inorganic metal particles, such as aluminum, which are admixed to the bonding solution for the preparation of a coating slurry. Metal parts coated with the coating compositions have very satisfactory properties such as heat and corrosion resistance.
Abstract:
A slider (1) comprising a swash plate (3) having a first sliding surface (3A), and a hemispherical shoe (4) sliding on that swash plate (3). The swash plate (3) is composed of a parent material (3B) of high strength brass containing Mn and Si, wherein micro granular Mn-Si compounds (6) are exposed to the interior and the first sliding surface (3A) of the parent material (3B). Since the swash plate (3) is etched after the parent material (3B) is cut, a large quantity of Mn-Si compound (6) is exposed to the first sliding surface (3A). A shoe (4) is composed of an iron based material and micro protrusions and recesses (4a, 4b) are formed on the second sliding surface (4A) of the shoe by laser quenching. Since a multiplicity of Mn-Si compounds (6) are exposed granularly to the first sliding surface (3A) of the swash plate (3), mutually continuous micro spaces exist at the adjacent positions and function as the circulating passage of lubricant. Consequently, wettability of lubricant to the first sliding surface (3A) is improved thus enhancing seizure resistance. Furthermore, load capacity of the second sliding surface (4A) of the shoe (4) can be enhanced because a multiplicity of micro protrusions and recesses (4a, 4b) are formed on the second sliding surface (4A) of the shoe (4) by laser quenching, and thereby abrasion resistance is improved.
Abstract:
The present application relates to a method for the production of an engine component, in particular a piston for an internal combustion engine, in which an aluminum alloy is cast in a diecasting process. The aluminum alloy comprises the following alloy elements: silicon: 11 to 14.5 % by weight, nickel: 1.7 to 3.5 % by weight, copper: 3.7 to 5.2 % by weight, magnesium: 1.6 to 3.5 % by weight, iron: 0.6 to 1.5 % by weight, manganese: 0.2 to 0.4 % by weight, zirconium: 0.04 to 0.1 % by weight, vanadium: 0.04 to 0.1 % by weight, the aluminum alloy otherwise comprising aluminum and unavoidable contaminants.
Abstract:
Die vorliegende Erfindung betrifft einen legierten perlitisch-ferritischen Stahl mit der folgenden Zusammensetzung, angegeben jeweils in Gew.-%: Kohlenstoff : 0,35 - 0,50; Silizium: 0,15 - 0,80; Mangan: 1,20 - 2,00; Phosphor: 0,00 - 0,0025; Stickstoff : 0, 010 - 0,035; Chrom: 0,00 - 0,50; Molybdän: 0,00 - 0,050; Nickel: 0,00 - 0,15; Kupfer: 0,00 - 0,40; Vanadium: 0,13 - 0,40; Titan: 0,001 - 0,004; Aluminium: 0,00 - 0,04; Niob: 0,00 - 0,05; wobei mindestens zwei der Elemente Vanadium, Aluminium und Niob enthalten sind. Der Stahl findet Verwendung für ein Bauteil für Verbrennungsmotoren, insbesondere für Kolben oder Kolbenteile.
Abstract:
The present invention employs an optimized cross-sectional shape for a ferromagnetic shape memory alloy (FSMA) composite that is used in a spring-type actuator, an improved hybrid magnetic trigger for use in FSMA based actuators, an a FSMA composite based spring type actuator, an a FSMA based spring type actuator including a stack of triggering units and FSMA springs, a FSMA composite based torque actuator. The invention also includes a model that can be employed to evaluate different materials being considered as components a FSMA for a FSMA composite used in either a FSMA based torque actuator or a FSMA spring actuator.
Abstract:
The present invention employs an optimized cross-sectional shape for a ferromagnetic shape memory alloy (FSMA) composite that is used in a spring-type actuator, an improved hybrid magnetic trigger for use in FSMA based actuators, an a FSMA composite based spring type actuator, an a FSMA based spring type actuator including a stack of triggering units and FSMA springs, a FSMA composite based torque actuator. The invention also includes a model that can be employed to evaluate different materials being considered as components a FSMA for a FSMA composite used in either a FSMA based torque actuator or a FSMA spring actuator.
Abstract:
A piston for diesel engines is made of a toughness-increasing aluminium alloy containing copper, nickel, silicon, magnesium, iron and manganese. The use of this material, which can conventionally be chill-cast, and by applying special dimensions, provides a piston which, despite its relatively light construction, provides the utmost security against cracking in the stressed regions, e.g. the piston boss or the combustion chamber recess.