Residual Stresses in Green Bodies of Steel Powder after Conventional and High Speed Compaction

Ericsson, Torsten; Luukkonen, Petri

doi:10.4028/www.scientific.net/msf.404-407.77

Cited by 8 publications

(4 citation statements)

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“…A number of investigations into the HVC process have been published in recent years. All publications indicate that high-density components can be obtained using HVC [1][2][3][4][5][6]. Other characteristics are low spring back, low ejection forces and uniform densities.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies and modelling of high-velocity loaded iron-powder compacts

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Experimental studies and modelling of high-velocity loaded iron-powder compacts

et al. 2014

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“…However, from a cost-performance point of view, the HVC technique is an exciting new process [6,7]. The process is similar to conventional pressing, such as die filling, compacting, and ejecting parts from the die, but it consists in accelerating a ram [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of powder particle size on green properties and stress wave

Wang

Yin

2009

Front. Mater. Sci. China

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In the powder metallurgy (PM) industry, high velocity compaction (HVC) technique is a new way to obtain higher density parts. In this study, three reduced pure iron powders with different particle sizes were pressed by HYP35-2 High Velocity Compaction Machine. A computer controlled universal testing machine was used to measure the bending strength of the green body. The relationships among the particle size, the impact velocity, the green density, the stress wave, the bending strength and the radial springback were discussed. The results show that the powder of -200 mesh is the best option among the three powders for the HVC process. At the identical impact velocity, the green density for the powder of -200 mesh is higher than the other two types of powders, while the bending strength and the radial springback for the powder of -300 mesh is the highest. In addition, the stress waves exhibit similar, pulsed waveforms. As the impact velocity rises up, the duration of the first peak decreases gradually, while that of the stress wave increases slowly. The response time for the powder of -200 mesh is shorter than the other two types of powders.

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“…In general, experimental analysis methods are classified as destructive or nondestructive. More and more researchers use nondestructive methods to analyze the distribution of residual stresses like X-ray and neutron diffraction techniques [3][4]. Recent years, numerical analysis methods have been powerful tool in this field, mainly numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Residual Stress in Powder Metallurgy Green Compact

Zhou

Zhang

Liu

2010

AMM

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Residual stress in green compact is an important factor to influence the quality of the compact and corresponding powder metallurgy product. To understand the residual stress, a finite element model is set up to simulate the single and double action pressing, unloading and ejecting of powder compacting process. Results show that compaction type has significant influence on the rule of residual stress state and the double action pressing is more helpful to reduce the risk of cracking than the single action pressing. Also better lubricant condition is beneficial to improve residual stress in the green compact.

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Residual Stresses in Green Bodies of Steel Powder after Conventional and High Speed Compaction

Cited by 8 publications

References 0 publications

Experimental studies and modelling of high-velocity loaded iron-powder compacts

Experimental studies and modelling of high-velocity loaded iron-powder compacts

Effect of powder particle size on green properties and stress wave

Residual Stress in Powder Metallurgy Green Compact

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