Aspects about Sintering Behaviour of a Titanium Hydride Powder Based Alloy Used for Automotive Components

2016 ◽  
Vol 823 ◽  
pp. 467-472
Author(s):  
Cristina Ileana Pascu ◽  
Stefan Gheorghe ◽  
Ilie Dumitru ◽  
Claudiu Nicolicescu
Keyword(s):  
Automotive Industry ◽  
Sintering Temperature ◽  
Low Cost ◽  
Test Results ◽  
Automotive Components ◽  
Titanium Hydride Powder ◽  
Powder Particles ◽  
Sintering Behaviour ◽  
High Originality ◽  
Hydride Powder

For this study with high originality, some aspects about the sintering behaviour of Titanium based alloy used for automotive components are presented. This paper presents the experimental results concerning the processing of Ti based alloy by Powder Metallurgy (PM) technology. The initial powder mixture consists in TiH2 micrometric powder particles that have been combined with some metallic powders for improving the final mechanic-chemicals and functional properties for using in the automotive industry. The classical PM route have been applied for obtaining a low-cost Ti- alloy.As a result it was compulsory to study the parameters that influence the densification process and the sintered properties, depending on the sintering temperature. The experimental test results were processed using the STATISTICA program. Therefore the influence of these sintering temperatures on the height and diameter shrinkages, density and hardness for the alloys based on Ti micrometric powders has been studied.

The Influence of the Foaming Agents on the Porosity of the PM Hydroxyapatite-Based Biocomposites Processed by Two-Step Sintering

2015 ◽  
Vol 1128 ◽  
pp. 178-186
Author(s):  
Cristina Teișanu ◽  
Carmen Ristoscu ◽  
Gabriela Sima
Keyword(s):  
Foaming Agent ◽  
Foaming Agents ◽  
Space Holder ◽  
Blowing Agent ◽  
Foaming Process ◽  
Eds Analysis ◽  
Titanium Hydride Powder ◽  
The Matrix ◽  
Powder Particles ◽  
Hydride Powder

This paper presents a comparative analysis of the foaming process developed in hydroxyapatite (HAp)-based bicomposites as a function of the foaming agent. The matrix of the biocomposite consists of either submicronic or micronic powder particles of HAp. The titanium hydride powder was added as reinforcement’s precursor as well as blowing agent, and in order to increase the biocomposites’ porosity calcium carbonate was added as space holder agent. The powders mixture was homogenized in a planetary ball mill with a single grinding bowl for 1 minute in air. Uniaxial cold compaction at 120-170 MPa was performed in order to obtain cylindrical green parts, which next were heated in argon atmosphere using the two step sintering technique at temperatures of 900 °C for 1 minute and 800°C for 450 - 600 minutes. The porosity of the biocomposite is analysed through calculations and SEM and EDS analysis highlighting the influence of the above mentioned foaming techniques (blowing and space holder).

Investigation of the Pore Morphology of the Hydroxyapatite-Based Bicomposites Processed by Two Step Sintering

2018 ◽  
Vol 27 ◽  
pp. 32-41
Author(s):  
Cristina Teisanu ◽  
Ion Cinca
Keyword(s):  
Ammonium Bicarbonate ◽  
Porous Network ◽  
Linear Measurements ◽  
Foaming Agent ◽  
Porous Hydroxyapatite ◽  
Foaming Agents ◽  
Optical Images ◽  
Titanium Hydride Powder ◽  
Powder Particles ◽  
Hydride Powder

Porous hydroxyapatite (HAp) based biocomposites used in biomedical applications were developed in this paper as artificial bone substitute for vertebrae grafts. The trabecular or spongy bone tissue is an open-cell porous network having 40-90% porosity. In order to obtain a porous structure calcium carbonate and ammonium bicarbonate were added as foaming agents to the biocomposite matrix. The biocomposite matrix was prepared using submicronic powder particles of HAp and titanium hydride powder, which was added as reinforcement’s precursor as well as foaming agent. The aim of this study is to emphasize the effect of the foaming agent additions on the pores morphology by performing analyses at both macro and micro scale. These analyses consist of linear measurements, surface auto-detection and statistics of the pores and optical images as well. The powders mixture was homogenized in a planetary ball mill, uniaxial cold compacted and then heated in argon atmosphere using the two step sintering technique.

Titanium and Titanium Alloy via Sintering of TiH2

2010 ◽  
Vol 436 ◽  
pp. 157-163 ◽  
Author(s):  
Hong Tao Wang ◽  
Michael Lefler ◽  
Z. Zak Fang ◽  
Ting Lei ◽  
Shu Ming Fang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Alloy Powder ◽  
Low Cost ◽  
Pure Titanium ◽  
Particle Sizes ◽  
New Approach ◽  
Blended Elemental ◽  
Titanium Hydride Powder ◽  
Transus Temperature ◽  
Hydride Powder

Blended elemental (BE) powder metallurgy (PM) is a promising low cost approach for manufacture titanium and titanium alloy components. Conventional BE method relies on sintering of pure titanium metal powder, while the new approach examined in this investigation produces bulk titanium materials by sintering titanium hydride powder. Dehydrogenation and densification of TiH2 powders with different particle sizes and TiH2-6Al-4V alloy powder was studied using thermogravimetric and dilatometric techniques. The results show that the dehydrogenation of TiH2 leads to very rapid shrinkage of α-Ti during sintering. In contrast, densification TiH2-6Al-4V requires dissolution of alloy elements which occurs during sintering above its beta transus temperature.

Experimental Verification and Finite Element Analysis of Automotive Door Hinge

2014 ◽  
Author(s):  
S. Doğan ◽  
C. Guven ◽  
F. Karpat ◽  
T. G. Yilmaz ◽  
O. Dogan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Automotive Industry ◽  
Low Cost ◽  
Dynamic Test ◽  
Test Results ◽  
Customer Requirements ◽  
Element Analysis ◽  
Door Hinge ◽  
Fixed Part

In automotive industry, achieving lightweight, low-cost, reliable and more accurate product design are the most important goal. Using Finite Element Analysis (FEA) is an important tool for achieving this since it decreases prototyping cost and time. Cars have different door system and one of the important part of them is door hinge. An automotive door hinge is mainly composed of three elements, fixed part, mobile part and hinge pin that fasten fixed part and mobile parts. Manufacturers have to perform tests and analysis for ensuring international and customer requirements. In this study, FEA results are compared with static and dynamic test results of front door hinge of automotive according to International specifications. The agreement between the computed and measured values is shown.

Study about the Influence of Two-Steps Sintering (TTS) Route for an Alloy Based on Titanium

2018 ◽  
Vol 880 ◽  
pp. 256-261
Author(s):  
Cristina Ileana Pascu ◽  
Stefan Gheorghe ◽  
Daniela Florentina Tărâţă ◽  
Claudiu Nicolicescu ◽  
Cosmin Mihai Miriţoiu
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Titanium Hydride ◽  
Low Cost ◽  
Ti Alloy ◽  
Metallic Powders ◽  
Titanium Hydride Powder ◽  
Hydride Powder

This paper describes the influence of two-steps sintering regime temperatures concerning the final properties of titanium hydride based alloy obtaining by Two-Steps Sintering (TTS) route, which is a method that is part of the Powder Metallurgy (PM) technology. The initial titanium hydride powder has been mixed with some metallic powders as: Alumix, Mn, Zr, Sn and graphite was added in different proportions for improving the final mechanical properties. The Two-Steps Sintering (TTS) route have been applied for obtaining a low-cost Ti- alloy. The effect of the sintering regime temperatures on the height and diameter shrinkages and density for these alloys based on titanium hydride powder was studied

scholarly journals Effect of Sintering Temperature on Microstructure and Mechanical Properties of Hot-Pressed Fe/FeAl2O4 Composite

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 422
Author(s):  
Kuai Zhang ◽  
Yungang Li ◽  
Hongyan Yan ◽  
Chuang Wang ◽  
Hui Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Hot Press ◽  
Microstructure And Mechanical Properties ◽  
Powder Particles ◽  
Hot Press Sintering ◽  
Sintering Method

An Fe/FeAl2O4 composite was prepared with Fe-Fe2O3-Al2O3 powder by a hot press sintering method. The mass ratio was 6:1:2, sintering pressure was 30 MPa, and holding time was 120 min. The raw materials for the powder particles were respectively 1 µm (Fe), 0.5 µm (Fe2O3), and 1 µm (Al2O3) in diameter. The effect of sintering temperature on the microstructure and mechanical properties of Fe/FeAl2O4 composite was studied. The results showed that Fe/FeAl2O4 composite was formed by in situ reaction at 1300 °C–1500 °C. With the increased sintering temperature, the microstructure and mechanical properties of the Fe/FeAl2O4 composite showed a change law that initially became better and then became worse. The best microstructure and optimal mechanical properties were obtained at 1400 °C. At this temperature, the grain size of Fe and FeAl2O4 phases in Fe/FeAl2O4 composite was uniform, the relative density was 96.7%, and the Vickers hardness and bending strength were 1.88 GPa and 280.0 MPa, respectively. The wettability between Fe and FeAl2O4 was enhanced with increased sintering temperature. And then the densification process was accelerated. Finally, the microstructure and mechanical properties of the Fe/FeAl2O4 composite were improved.

scholarly journals Dehydrogenation and spheroidization of titanium hydride powder based on fluidization principle

2020 ◽  
Vol 2 (1) ◽  
pp. 22-29
Author(s):  
Yan Zheng ◽  
Jingfan Zhang ◽  
Yue Liu ◽  
Shizhao Jia ◽  
Ruolan Tang ◽  
...  
Keyword(s):  
Titanium Hydride ◽  
Titanium Hydride Powder ◽  
Hydride Powder
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