Entity

Time filter

Source Type

Ridgway, PA, United States

Chernenkoff R.A.,Metaldyne LLC | Adams J.P.,Metal Powder Industries Federation
Euro PM 2014 Congress and Exhibition, Proceedings | Year: 2014

The majority of fatigue analyses of sintered powder metallurgy materials have been and continue to be generated using the traditional stress-based approach. This approach is based on nominal (average) stresses within a component that is being analyzed. While most engineered components are designed such that nominal stresses remain elastic during service loads, local areas of stress concentration can cause plastic strains. The strain-based approach to fatigue involves detailed analysis of localized plastic deformation (yielding) that may occur in these areas of stress concentration and is used as a basis for calculating fatigue life. A long-term program is being conducted by the Center of Powder Metallurgy Technology (CPMT) in collaboration with the Metal Powder Industries Federation (MPIF) Standards Committee to determine the strain-based fatigue properties of sintered materials using machined cylindrical axial fatigue specimens. This paper features pre-alloyed and hybrid low-alloy steels in the as-sintered and heat treated conditions. Results show cyclic stress-strain data, strain-life data and cyclic properties for several materials.


Ferfecki F.J.,Victrex United States Inc. | Hale A.,Metaldyne LLC
SAE 2011 World Congress and Exhibition | Year: 2011

A joint development program between Metaldyne and Victrex Polymer Solutions was established with the goal of developing a cost effective net shape injection molded gear that provides improvements in NVH (Noise Vibration and Harshness) and operating efficiency over conventional high quality iron gears. A detailed DOE (Design of Experiments) evaluating NVH performance of machined gears was performed in a calibrated NVH test cell. Variables in the DOE included material, gear geometry and backlash variation. The DOE showed the PEEK material gears had different geometric sensitivities, such as helix angle effects, on NVH performance. The results of the DOE were then used to develop an optimal injection molded PEEK polymer gear design. A production quality injection molding gear tool was constructed. Net shape production quality PEEK polymer gears were injection molded and the gears were evaluated in a current production mass balance unit for NVH, mechanical efficiency and durability. The study shows when compared to the baseline gears a net shape injection molded PEEK polymer gear provides a 3db noise reduction, as much as 9% reduction in power consumption, a 69% mass reduction and meets the application durability requirements. © 2011 SAE International.


Ilia E.,Metaldyne LLC
Advances in Powder Metallurgy and Particulate Materials - 2014, Proceedings of the 2014 World Congress on Powder Metallurgy and Particulate Materials, PM 2014 | Year: 2014

The operating environment in an engine can have negative effects on the performance of connecting rods, as it is well-known that the strength of most steels deteriorates at higher temperatures. Although the mechanical properties of the materials used to manufacture connecting rods have been widely characterized at room temperature, their strength has not been investigated at higher temperatures. This work was undertaken to fill this gap and analyze the behavior of these materials at engine operating temperatures. Tensile and compressive yield strength tests were conducted at 120 °C (248 °F) and 150 °C (302 °F) on specimens machined from connecting rods. The strength of the materials used to manufacture connecting rods through steel forging declines at operating temperatures, while, on the contrary, the strength of the materials used to manufacture powder forged connecting rods improves. Scanning electron microscopy and transmission electron microscopy were employed to investigate the powder forged materials in order to explain the strengthening mechanism causing the improvement. Copious Cu-rich nano precipitates were observed in the powder forged specimens tested at higher temperatures.


Trademark
Metaldyne Company LLC | Date: 2007-04-13

Vehicle parts, namely crankshaft components for controlling vibration in the nature of harmonic dampers, harmonic balancers, and isolators. Design and development of crankshaft components for others.


Trademark
Metaldyne Company LLC | Date: 2007-04-13

Vehicle parts, namely crankshaft components for controlling vibration in the nature of harmonic dampers, harmonic balancers, and isolators. Design and development of crankshaft components for others.

Discover hidden collaborations