SIMILAR SPECIFICATIONS—UNS Z33521, former SAE 903, ingot is similar to ASTM B 240-79, Alloy AG40A; and UNS Z33520, former SAE 903, die casting is similar to ASTM B 86-76, Alloy AG40A. UNS Z35530, former SAE 925, ingot is similar to ASTM B 240-79, Alloy AC41A; and UNS Z35531, former SAE 925, die casting is similar to ASTM B 86-82a, Alloy AC41A.

Metals Technical Committee

Controlling Soft Robots Using Magnetic Fields

TBMG-2819101/01/2018

A fundamental advance in controlling soft robots involves using magnetic fields to remotely manipulate microparticle chains embedded in soft robotic devices. Several devices have been developed that make use of the new technique. Possible applications for these devices range from remotely triggered pumps for drug delivery, to the development of remotely deployable structures.

Zinc Die Casting Alloys

J469_201712 (Current)

12/20/2017

Because of the drastic chilling involved in die casting and the fact that the solid solubilities of both aluminum and copper in zinc change with temperature, these alloys are subject to some aging changes, one of which is a dimensional change. Both of the alloys undergo a slight shrinkage after casting, which at room temperature is about two-thirds complete in five weeks. It is possible to accelerate this shrinkage by a stabilizing anneal, after which no further changes occur. The recommended stabilizing anneal is 3 to 6 h at 100 °C (212 °F), or 5 to 10 h at 85 °C (185 °F), or 10 to 20 h at 70 °C (158 °F). The time in each case is measured from the time at which the castings reach the annealing temperature. The parts may be air cooled after annealing. Such a treatment will cause a shrinkage (0.0004 in per in) of about two-thirds of the total, and the remaining shrinkage will occur at room temperature during the subsequent few weeks. Stabilizing results in a decrease in dimensions of

Metals Technical Committee

Identification Castings

AMS2804D (Current)

10/12/2017

This specification covers the requirements for identification of castings.

AMS B Finishes Processes and Fluids Committee

Application of Six Sigma Methodology to Improve Product Quality in Injection Molded Parts at Supplier End in Motorcycle Industry

2017-01-501109/29/2017

Process Parameters play a vital role in product quality of Injection Molded components. Variation in process parameters will lead to Injection Molded manufacturing defects like Sink Mark, Flow Mark, Silver Streak, Flash, Warping, Weld lines, Jetting, voids, Short Shot & Bubbles. This manuscript is innovative because suppliers (Tier 1 and Tier 2) do not use DoE for standardization of their process parameters in Injection Molding and High Pressure Die Casting. They do trial and error method to arrive at the process parameters which is error prone and time consuming. The variation of process parameters can be optimized using Six Sigma approach, a structured methodology which is Process focused & data driven approach. The purpose of this paper is to present through a case study how the concepts of Design of Experiments, which is a part of Six Sigma Methodology can be used for improving the Injection Molding Process at supplier end reducing defects & hence improving Quality at supplier

Shankaranarayana, Raviprakash

Vote for Tech Briefs 22nd Annual Readers' Choice Awards

TBMG-2607112/01/2016

Each December, we ask our readers to cast their vote for the annual NASA Tech Briefs’ Readers’ Choice Product of the Year Awards. Each month, our editors choose a Product of the Month that has exceptional technical merit and practical value for our design engineering readers.

Push-On Spring Nuts Metric Series - General Specifications

J892M_201611 (Current)11/21/2016

Included herein are general, dimensional, and performance specifications for those types, styles, and sizes of steel stamped Push-On Spring Nuts recognized as SAE standard. These nuts are intended for general use where the engagement on the mating metal or plastic studs and in some cases screw bolt threads is considered adequate for the fastening joint application. It should be noted that Push-On Spring Nuts having other characteristics and configurations are available and manufacturers should be consulted. For the inch equivalent of this document, see SAE J892.

Fasteners Committee

Predicting Stress vs. Strain Behaviors of Thin-Walled High Pressure Die Cast Magnesium Alloy with Actual Pore Distribution

2016-01-029004/05/2016

In this paper, a three-dimensional (3D) microstructure-based finite element modeling method (i.e., extrinsic modeling method) is developed, which can be used in examining the effects of porosity on the ductility/fracture of Mg castings. For this purpose, AM60 Mg tensile samples were generated under high-pressure die-casting in a specially-designed mold. Before the tensile test, the samples were CT-scanned to obtain the pore distributions within the samples. 3D microstructure-based finite element models were then developed based on the obtained actual pore distributions of the gauge area. The input properties for the matrix material were determined by fitting the simulation result to the experimental result of a selected sample, and then used for all the other samples’ simulation. The results show that the ductility and fracture locations predicted from simulations agree well with the experimental results. This indicates that the developed 3D extrinsic modeling method may be used to

Choi, Kyoo Sil, Barker, Erin, Cheng, Guang, Sun, Xin, Forsmark, Joy, Li, Mei

Fabrication of an Integrated Photonic Waveguide Joint in Micromachined Silicon

TBMG-2425504/01/2016

High-aspect-ratio silicon structures are necessary components in many MEMS (microelectromechanical systems). Aspect ratio is defined as the ratio of the height of the structure to its lateral width. The structures are typically fabricated through bulk micromachining steps such as deep reactive ion etching. In some cases, multiple levels of high-aspect-ratio structures are required. For instance, one may want to etch completely through a silicon wafer to thermally isolate a bolometer or provide waveguide coupling to an antenna defined on an insulating membrane, and at the same time have integrated high-topology structures required for microwave coupling or filtering. Definition of the structures typically uses photolithographic technology. But for high-aspect-ratio structures, spin cast resist becomes difficult to incorporate due to the non-uniform thickness of the resist around tall structures. One can cast very thick layers of photoresist, but this limits the minimum feature size, and

Surface Generation speeds composites throughput with one-shot stamp-forming process

16MEIP03_2103/01/2016

Surface Generation is working with research group WMG, an academic department of the University of Warwick, and AGC AeroComposites to develop new composite press-forming processes for automotive and aerospace manufacturers. Surface Generation, a U.K.-based provider of advanced carbon-fiber processing technologies, is developing new press-forming mold faces that incorporate its patented PtFS (Production to Functional Specifications) technology for the production of high-performance thermoplastic composite components. By integrating Surface Generation's active thermal management technologies into the mold face itself, WMG and AGC are able to continuously adapt heating and cooling levels for each mold area and process stage in real time. The companies believe that this enhanced capability will improve both the quality and throughput of compression molding applications.

Gehm, Ryan

Surface Generation speeds composites throughput with one-shot stamp-forming process

16AUTP02_0702/01/2016

Gehm, Ryan

Surface Generation speeds composites throughput with one-shot stamp-forming process

16OFHP02_0602/01/2016

Gehm, Ryan

AS2989 Locking Screw – Die Casting

AS2989-3 (Current)12/04/2015

No scope available.

Engine and Airframe Technical Standards Committee (TSC)

AGS511 Ballast Weights. (Grey Cast Iron)

AGS511-2 (Current)12/03/2015

No scope available.

Engine and Airframe Technical Standards Committee (TSC)

Vote for Tech Briefs' 21st Annual Readers' Choice Awards

TBMG-2354812/01/2015

Each December, we ask our readers to cast their vote for the annual NASA Tech Briefs Readers’ Choice Product of the Year Awards. Each month, our editors choose a Product of the Month that has exceptional technical merit and practical value for our design engineering readers.

SAE Eye on Engineering: Aluminum Die Casting Revolution

1206310/25/2015

There's a revolution going on within the bones of new cars and trucks – new body structures that are much lighter and stronger, for better fuel economy, safety, and handling. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the heroes of the revolution: aluminum die castings. SAE Eye on Engineering also airs Monday mornings on WJR 760 AM Detroit's Paul W. Smith Show. Access archived episodes of SAE Eye on Engineering at: http://www.sae.org/magazines/podcasts.

Low-Pressure Casting of Bulk Metallic Glasses for Gears and Other Applications

TBMG-22405

07/01/2015

With the correct selection of composition, some bulk metallic glasses (BMGs) have been demonstrated that have excellent combinations of hardness, fracture toughness, and wear resistance so that their use in gears and gearboxes is a potentially commercially viable application. For BMGs to be used as a low-cost alternative to steel gears, rapid fabrication strategies are needed to cast the BMGs into net-shaped gears that require little or no post-casting machining prior to use. Die casting, suction casting, and other cold-mold casting techniques have been widely demonstrated for BMGs in the past, but the unique nature of gears precludes traditional techniques from being used in an optimal way.