Tensile and Compressive Properties of Low-Cost High-Strength β-Type Ti-Mn Alloys Fabricated by Metal Injection Molding

Injection molding process one of the most important methods to produce plastic parts with high efficiency and low cost. Today, Injection molded parts have been increased dramatically the demand for high strength and quality applications. In this study, truck brake pedal is made of Cast iron and plastic materials to replace the frame for the optimization process that minimizes the runner and the gate dimension will determine the size and shape. Runner and gate dimensions of change based on availability of the product. I will discuss the injection molding. This report investigates that the optimum injection molding condition for minimum of runner and gate position. The FEM Simulation CAE tool, MOLDFLOW, is used for the analysis of injection molding process.

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Metal Injection Molding of Super Elastic Ti Alloy Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.706-709.1961 ◽

2012 ◽

Vol 706-709 ◽

pp. 1961-1966 ◽

Cited By ~ 1

Author(s):

Hideshi Miura ◽

Hyun Goo Kang ◽

Kensaku Sagara

Keyword(s):

Heat Treatment ◽

Injection Molding ◽

High Strength ◽

Elastic Behavior ◽

Metal Injection Molding ◽

Ti Alloy ◽

Specific Strength ◽

Treatment Conditions ◽

Powder Type ◽

Powder Compacts

Ti-10V-2Fe-3Al is one of super elastic Ti alloys, which is the b type Ti alloy and shows the excellent properties such as high specific strength and corrosion resistance. By the combination of Cold working and heat treatment, high strength as same as the steels are obtained. Therefore, Ti-10V-2Fe-3Al is hoped to be a next generation’s spring material. In this study, Metal Injection Molding of super elastic Ti alloy materials are investigated by changing the process parameters such as powder type (mixed elemental or alloy), debinding and sintering conditions, and heat treatment conditions to obtain the excellent super elastic properties. Tensile strength of injection molded Ti-10V-2Fe-3Al compacts sintered at 1250 with mixed elemental powders showed approximately 85% of wrought materials. On the other hand, alloy powder compacts showed about 80% strength of wrought materials. Their super elastic behavior depended strongly on the heat treatment conditions.

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Improvement in mechanical strength of low-cost β-type Ti–Mn alloys fabricated by metal injection molding through cold rolling

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2015.12.200 ◽

2016 ◽

Vol 664 ◽

pp. 272-283 ◽

Cited By ~ 24

Author(s):

Ken Cho ◽

Mitsuo Niinomi ◽

Masaaki Nakai ◽

Huihong Liu ◽

Pedro F. Santos ◽

...

Keyword(s):

Injection Molding ◽

Cold Rolling ◽

Mechanical Strength ◽

Low Cost ◽

Metal Injection Molding

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New Titanium Alloy Feedstock for High Performance Metal Injection Molding Parts

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.704.118 ◽

2016 ◽

Vol 704 ◽

pp. 118-121 ◽

Cited By ~ 1

Author(s):

Toby Tingskog ◽

Frederic Larouche ◽

Louis Philippe Lefebvre

Keyword(s):

Titanium Alloy ◽

Injection Molding ◽

Titanium Alloys ◽

High Performance ◽

High Strength ◽

Metal Injection Molding ◽

Low Density ◽

Metallurgical Properties ◽

Sporting Goods

Ti 6-4 and other Titanium alloys have great potential for Metal Injection Molding of high performance parts. Markets like Automotive, Aerospace, 3C and sporting goods can benefit from the low density and high strength of Titanium. A new feedstock has been developed that incorporates pre-alloyed Ti 6-4 and discrete additions that simplify MIM processing and enhance properties. Processing and sintering parameters are presented together with mechanical and metallurgical properties of completed parts.

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Sintering metal injection molding parts of tungsten-based steel using microwave and conventional heating methods

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405418816853 ◽

2018 ◽

Vol 233 (11) ◽

pp. 2138-2146 ◽

Cited By ~ 3

Author(s):

Veeresh Nayak C ◽

Ramesh MR ◽

Vijay Desai ◽

Sudip Kumar Samanta

Keyword(s):

Injection Molding ◽

Microwave Sintering ◽

Weight Ratio ◽

High Strength ◽

Conventional Heating ◽

Metal Injection Molding ◽

Injection Molding Process ◽

Molding Process ◽

Homogeneous Microstructure ◽

Microwave Assisted

In recent years, the near net shape metal injection molding process combines desirable features of plastic injection molding and powder metallurgy processes to gain high strength-to-weight ratio for manufacturing complex-shaped parts. The metal injection molding process consists of mixing, molding, debinding, and sintering. Microwave processing has attracted much attention in global research because of its unique features such as its ability to heat and sinter a wide variety of metals and its significant advantages in energy efficiency, processing speed, and compatibility. Also, it presents few environmental risks and can produce refined microstructures. The injected samples to be sintered are composed of fine tool steel metal powder and binders, stearic acid, paraffin wax, low-density polyethylene, and polyethylene glycol (600). In recent years, microwave-assisted post-treatment is considered a novel method for processing green parts. In this work, the green parts are subjected to high-intensity microwave fields which operate at a frequency of 2.45 GHz. Metal injection molding compacts were sintered using multi-mode microwave radiation. The sintering of a metal injection molding compact by microwaves has hardly been reported. The metal injection molding compact showed better results than those produced by sintering with conventional heating. This study evaluates the effect of conventional sintering and microwave sintering on mechanical properties. By optimizing the sintering process, increased sintered hardness, a more homogeneous microstructure, and greater shrinkage were obtained using microwave-assisted sintering.

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Influence of Sintering Temperature on Mechanical Properties of Ti-6Al-4V Compacts by Metal Injection Molding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.2639 ◽

2005 ◽

Vol 475-479 ◽

pp. 2639-2642 ◽

Cited By ~ 3

Author(s):

Shi Bo Guo ◽

Xuan Hui Qu ◽

Xin Bo He

Keyword(s):

Mechanical Properties ◽

Injection Molding ◽

Titanium Alloys ◽

Sintering Temperature ◽

High Vacuum ◽

High Strength ◽

Metal Injection Molding ◽

Light Elements ◽

Excellent Corrosion Resistance ◽

Real Challenge

Titanium and titanium alloys have low density, high strength, excellent corrosion resistance in many media and are known to be biocompatible. This combination of properties makes titanium and its alloys an excellent choice for the applications, such as watch parts, medical devices, dental parts and sports goods. However, in the respect of fabricating complicated shaped parts, low machinability may be a barrier to practical uses. Therefore, it is considered to be very available that metal injection molding(MIM) process is applied to fabricate titanium alloy parts[1-2]. Nevertheless, injection molding of titanium and its alloys presents a real challenge to the processor due to its reactivity. Titanium not only has a strong affinity to oxygen, but also tends to react readily with carbon, nitrogen or hydrogen from the furnace atmosphere. Therefore, contamination by interstitial light elements such as oxygen and carbon is a serious problem because they have much influence on the mechanical properties of titanium alloys[3-5]. So it is necessary to control debinding and sintering conditions. In this paper, preparation of Ti-6Al-4V compacts was performed by MIM process. To reduce the contamination, the debound compacts were sintered at moderate temperature range from 1170°C to 1320°C and high vacuum (10-3Pa). On these conditions, the mechanical properties and relative density of sintered compacts were investigated.

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