Powder Metallurgy for Light Weight and Ultra-Light Weight Materials

Kieback, Bernd; Stephani, G.; Weiβgarber, T.; Schubert, Thomas; Waag, U.; Böhm, Alexander; Anderson, Orson L.; Göhler, Hartmut; Reinfried, Matthias

doi:10.4150/kpmi.2003.10.6.383

Cited by 4 publications

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“…Moreover, the product weight is relatively lighter than if it is produced from wrought steel [1]. New techniques of adding alloys to the steel PM for having lighter weight were discussed in [6,7].…”

Section: Benefits and Limitations Of Pm Gearsmentioning

confidence: 99%

Using powder metal gears in industrial applications- A review

Mohammed¹

2023

Advanced Topics in Mechanics of Materials, Structures and Construction

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Abstract. Due to the high performance, lightweight, competitiveness and net shape of the parts produced using sintered Powder Metallurgy (PM), PM-based products are used in different industrial applications. PM method offers high precision and repeatability, maximum material utilization, tailored shape properties, freedom of design, cost efficiency, and sustainability. These advantages are driving the ongoing demand for PM products and for the PM method as a good alternative to the conventional gear production methods. The use of PM is confirmed as an applicable technology for gear production. However, the strength and NVH characteristics of PM-products still require more investigation. In the current paper, the mechanical properties, strength and NVH characteristics are presented and discussed. The paper concludes based on the presented overview of the applicability of PM gears in the industry, further research investigation is needed on both the system and component levels to improve the durability and NVH behavior which are important for extending the PM parts’ application. Moreover, the sustainability aspects of powder metallurgy technology should be emphasized.

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Section: Benefits and Limitations Of Pm Gearsmentioning

confidence: 99%

Using powder metal gears in industrial applications- A review

Mohammed¹

2023

Advanced Topics in Mechanics of Materials, Structures and Construction

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“…Over the decades, the transition from iron-based heavy alloys to lighter alloys has continued to gain more attention in the automotive and aerospace industries, due to the growing demand for weight reduction, improved fuel economy, and, therefore, less pollutant vehicles. To be considered for such purposes, light alloys must have sufficiently high mechanical properties (i.e., hardness and tensile strength) and, in some cases, well-controlled coefficients of thermal expansion [ 1 , 2 , 3 , 4 , 5 , 6 ]. The need for new materials capable of meeting increasingly stringent requirements has led to the development—in the last two decades—of low-weight metal matrix composites (MMCs).…”

Section: Introductionmentioning

confidence: 99%

Effects of Fused Silica Addition on Thermal Expansion, Density, and Hardness of Alumix-231 Based Composites

Rodrigues

Marinković

2022

Materials

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Fused silica is a ceramic with promising applications as a filler in composites due to its near-zero thermal expansion. Substitution of heavy cast iron with Al-based light alloys is of utmost importance for the automotive industry. However, the high thermal expansion of Al alloys is an obstacle to their use in some applications. As such, ceramic fillers are natural candidates for tuning thermal expansion of Al-based matrices, due to their inherently moderate or low thermal expansion. Alumix-231 is a new promising alloy, and fused silica has never been used before to lower its thermal expansion. Composites with the addition of 5 to 20 vol.% of fused silica were developed through powder metallurgy, and the best results in terms of reduction of thermal expansion were reached after liquid phase sintering at 565 °C. Coefficients of thermal expansion as low as 13.70 and 12.73 × 10−6 °C−1 (between 25 and 400 °C) were reached for the addition of 15 and 20 vol.% of fused silica, a reduction of 29.9% and 34.8%, respectively, in comparison to neat Alumix-231. In addition, the density and hardness of these composites were not significantly affected, since they suffered only a small decrease, no higher than 6% and 5%, respectively. As such, the obtained results showed that Alumix-231/fused silica composites are promising materials for automotive applications.

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“…As a matter of fact, powder metallurgy shows improved buy-to-fly ratio with facile production for complex components fabrication when it is compared to conventional subtractive manufacturing that is based on casting and machining [1][2][3][4]. Powders such as blended elemental powders and pre-alloyed powders are compacted and then sintered in the conventional powder metallurgy.…”

Section: Introductionmentioning

confidence: 99%

Double Step Sintering Behavior Of 316L Nanoparticle Dispersed Micro-Sphere Powder

Jeon¹,

Sohn²,

Lee³

et al. 2015

Archives of Metallurgy and Materials

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316L stainless steel is a well-established engineering material and lots of components are fabricated by either ingot metallurgy or powder metallurgy. From the viewpoints of material properties and process versatility, powder metallurgy has been widely applied in industries. Generally, stainless steel powders are prepared by atomization processes and powder characteristics, compaction ability, and sinterability are quite different according to the powder preparation process. In the present study, a nanoparticle dispersed micro-sphere powder is synthesized by pulse wire explosion of 316L stainless steel wire in order to facilitate compaction ability and sintering ability. Nanoparticles which are deposited on the surface of micro-powder are advantageous for a rigid die compaction while spherical micro-powder is not to be compacted. Additionally, double step sintering behavior is observed for the powder in the dilatometry of cylindrical compact body. Earlier shrinkage peak comes from the sintering of nanoparticle and later one results from the micro-powder sintering. Microstructure as well as phase composition of the sintered body is investigated.

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Powder Metallurgy for Light Weight and Ultra-Light Weight Materials

Cited by 4 publications

References 0 publications

Using powder metal gears in industrial applications- A review

Using powder metal gears in industrial applications- A review

Effects of Fused Silica Addition on Thermal Expansion, Density, and Hardness of Alumix-231 Based Composites

Double Step Sintering Behavior Of 316L Nanoparticle Dispersed Micro-Sphere Powder

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