Fatigue Tests and Fracture Behavior Analysis of Porous Implant Materials Fabricated by 3D Metal Printing Technology

Purpose This paper aims to comprehensively review ultrasonic additive manufacturing (UAM) process history, technology advancements, application areas and research areas. UAM, a hybrid 3D metal printing technology, uses ultrasonic energy to produce metallurgical bonds between layers of metal foils near room temperature. No melting occurs in the process – it is a solid-state 3D metal printing technology. Design/methodology/approach The paper is formatted chronologically to help readers better distinguish advancements and changes in the UAM process through the years. Contributions and advancements are summarized by academic or research institution following this chronological format. Findings This paper summarizes key physics of the process, characterization methods, mechanical properties, past and active research areas, process limitations and application areas. Originality/value This paper reviews the UAM process for the first time.

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Fracture Behavior Analysis of Multi-Walled Carbon Nanotubes Reinforced Potassium-Geopolymer Composites at Microscopic Scale

10.26226/morressier.5f5f8e69aa777f8ba5bd5f75 ◽

2020 ◽

Author(s):

Jiaxin Chen

Keyword(s):

Carbon Nanotubes ◽

Behavior Analysis ◽

Fracture Behavior ◽

Microscopic Scale ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes ◽

Geopolymer Composites

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Fracture Behavior of Ceramics Used in Multilayer Capacitors

MRS Proceedings ◽

10.1557/proc-72-81 ◽

1986 ◽

Vol 72 ◽

Cited By ~ 6

Author(s):

Theresa L. Baker ◽

Stephen W. Freiman

Keyword(s):

Crack Growth ◽

Fracture Behavior ◽

Ceramic Materials ◽

Fatigue Tests ◽

Internal Stresses ◽

Crack Growth Behavior ◽

Multilayer Capacitors ◽

Materials Used ◽

Aging Phenomena

AbstractThis study involved the determination of the effects of composition and microstructure on the fracture toughness and susceptibility to environmentally enhanced crack growth of several ceramic materials used in multilayer capacitors. Indentation-fracture procedures were used to measure KIC as well as to assess the possible effects of internal stresses on the fracture behavior of these materials and to correlate dielectric aging phenomena with strength. The environmentally enhanced crack growth behavior of these materials was determined by conducting dynamic fatigue tests in water.

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Boiling Enhanced Lidded Server Packages for Two-Phase Immersion Cooling Using 3D Metal Printing and Metal Injection Molding Technologies

Journal of Electronic Packaging ◽

10.1115/1.4052711 ◽

2021 ◽

Author(s):

Jimmy Chuang ◽

Jin Yang ◽

David Shia ◽

Y L Li

Keyword(s):

Injection Molding ◽

High Performance ◽

Heat Dissipation ◽

Thermal Design ◽

Metal Injection Molding ◽

Electronic Packages ◽

Two Phase ◽

Immersion Cooling ◽

Metal Printing ◽

3D Metal Printing

Abstract In order to meet increasing performance demand from high-performance computing (HPC) and edge computing, thermal design power (TDP) of CPU and GPU needs to increase. This creates thermal challenge to corresponding electronic packages with respect to heat dissipation. In order to address this challenge, two-phase immersion cooling is gaining attention as its primary mode of heat of removal is via liquid-to-vapor phase change, which can occur at relatively low and constant temperatures. In this paper, integrated heat spreader (IHS) with boiling enhancement features is proposed. 3D metal printing and metal injection molding (MIM) are the two approaches used to manufacture the new IHS. The resultant IHS with enhancement features are used to build test vehicles (TV) by following standard electronic package assembly process. Experimental results demonstrated that boiling enhanced TVs improved two-phase immersion cooling capability by over 50% as compared to baseline TV without boiling enhanced features.

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Mechanical Properties of Flat Braided Composites With a Circular Hole

10.1115/imece1999-0512 ◽

1999 ◽

Author(s):

Takeru Ohki ◽

Shinya Ikegaki ◽

Ken Kurasiki ◽

Hiroyuki Hamada ◽

Masaharu Iwamoto

Keyword(s):

Mechanical Properties ◽

Tensile Test ◽

Circular Hole ◽

Fracture Behavior ◽

Fatigue Property ◽

Tensile Tests ◽

Fatigue Tests ◽

Braided Composites ◽

Static Tensile ◽

The One

Abstract In this study, fracture behavior and strength in the flat braided bar with a circular hole were investigated by static and fatigue test. Two type of specimens were prepared. They are a braided flat bar with an integrally-formed braided hole and a braided flat bar with a machined hole. Moreover, we also examined a specimen that had a metal pin inserted at the circular hole. This specimen was subjected to a static tensile test. The results of the tensile tests indicate that the strength of the flat bar with a braided hole was larger than that of the one with the machined hole. Furthermore, from the results of the fatigue tests, the flat bar with the braided hole showed higher fatigue property than that of the one with the machined hole.

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