Failure maps for rectangular 17-4PH stainless steel sandwiched foam panels

Raj, S. V.; Ghosn, Louis J.

doi:10.1016/j.msea.2007.03.102

Cited by 18 publications

(7 citation statements)

References 26 publications

(24 reference statements)

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“…Foamed materials are still expensive, so their use is restricted to aerospace applications [1,7]. Ni-718 superalloy with proper development of the strength to weight ratio could be an alternative to other superalloys and foam materials [3][4][5][6][7][8][9]. Nickel-based superalloys are an unusual group of metallic materials, showing an extraordinary combination of high-temperature strength, toughness, and surface stability in corrosive or oxidative environments [10,11].…”

Section: Introductionmentioning

confidence: 99%

Ni-718 superalloy foam processed by powder space-holder technique: Microstructural and mechanical characterization

Timac¹,

Gülsoy²

2021

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In this work, porous Ni-718 superalloys were produced by use of a water soluble pore forming agent before sintering. Carbamide particles were used as the space-holder material. After mixing and compaction, the space-holder particles were extracted using hot water leaching over a range of temperatures. The porous green parts were thermally debound to remove the paraffin wax under a pure argon atmosphere and then sintered at high vacuum. The effects of the volume fraction of space-holder particles on density and porosity were investigated. Microstructures were captured using optical and scanning electron microscopy. Also, compression tests were conducted on the sintered samples.

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Section: Introductionmentioning

confidence: 99%

Ni-718 superalloy foam processed by powder space-holder technique: Microstructural and mechanical characterization

Timac¹,

Gülsoy²

2021

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“…Foam metal can also be used to reduce vibration of the component. In this manner, the optimal mechanical properties under a certain load can be achieved based on the excellent characteristics of the foam metal (Raj and Ghosn, 2007).…”

Section: Introductionmentioning

confidence: 99%

Effect of foam copper interlayer on the mechanical properties and fretting wear of sandwich clinched joints

Lei

Xing

et al. 2019

Journal of Materials Processing Technology

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Fretting wear has a considerable effect on the fatigue properties of clinched joints and is the most important cause of fatigue failure in them. Foam metal is a new type of structural material that can be sandwiched into a clinched joint to improve its mechanical properties with respect to fretting wear.In the work reported here, clinched single-lap and cross-lap joints with and without foam copper layers were prepared and subjected to static load testing. Fatigue tests were conducted on the single-lap joints to analyse the fatigue properties and failure modes of the aluminium-alloy clinched and foam metal sandwich clinched joints.The damage caused in single-lap joints by fretting wear was assessed by examining joint cross-sections before completely fatigue broken. Scanning electron microscopy and energy spectrometry were used to examine the failure fractures of the two kinds of joints and to investigate the fretting wear failure mechanism. The incorporation of the foam copper layer increased the shear strength of the clinched joint by 5% but had little effect on the peeling strength. It also increased the energy absorption capacity of the joint under a shear force by 33%, but reduced it under a peeling load by 27%.The fretting wear of the clinched joint occurred mainly at the contact surface of the two sheets in the lap area and at the clinched neck. Fretting wear generated oxide wear debris and caused micro-cracks on the sheet surface and these micro-cracks then continuously expanded until sheet fracture failure occurred.The foam copper layer effectively reduced the fretting wear between the upper and lower sheets and greatly enhanced the fatigue life of the aluminium-alloy clinched joint.

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“…With the concept of green design and manufacturing, lightweight structures are frequently used in different manufacturing elds. As a low-density material, metal foam exhibits characteristics of small volume density, relatively lightweight feature, large surface area, high mechanical performances and good damping property 1,2) . As structural parts, the metal foams are usually used in combination with traditional compact metals.…”

Section: Introductionmentioning

confidence: 99%

Self-Piercing Riveting of Metal Foam Sandwich Structures

Liu

Deng

2017

Mater. Trans.

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Metal foam sandwich structures are widely used in construction and transportation elds because of their good acoustic performance, high thermal stability, lightweight, and high stiffness. This paper deals with join-ability of self-piercing riveted metal foam sandwich structures. Self-piercing riveting tests were performed on AA5052 aluminium alloy sandwich structures embedded with different metal foams. Tensile-shear tests were conducted to characterize the mechanical properties of different self-piercing riveted metal foam sandwich structures. The results illustrate that the connection of metal foam sandwich structures can be effectively realised with the self-piercing riveting technique. The joints exhibit good forming quality and mechanical performance. For metal foam sandwich joints, the sandwich structures embedded with nickel foam exhibits the best mechanical properties. The failure modes of the self-piercing riveted sandwich structures were observed at the separation of the lower sheets and rivet.

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Failure maps for rectangular 17-4PH stainless steel sandwiched foam panels

Cited by 18 publications

References 26 publications

Ni-718 superalloy foam processed by powder space-holder technique: Microstructural and mechanical characterization

Ni-718 superalloy foam processed by powder space-holder technique: Microstructural and mechanical characterization

Effect of foam copper interlayer on the mechanical properties and fretting wear of sandwich clinched joints

Self-Piercing Riveting of Metal Foam Sandwich Structures

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