Assessing porosity in selective electron beam melting manufactured Ti–6Al–4V by nonlinear impact modulation spectroscopy

0535351 - ÚT 2021 RIV US eng J - Journal Article
Kober, Jan - Kirchner, A. - Kruisová, Alena - Chlada, Milan - Hirsekorn, Sigrun - Weiβgärber, T. - Převorovský, Zdeněk
Assessing porosity in selective electron beam melting manufactured Ti–6Al–4V by nonlinear impact modulation spectroscopy.
Journal of Nondestructive Evaluation. Roč. 39, č. 4 (2020), č. článku 86. ISSN 0195-9298. E-ISSN 1573-4862
R&D Projects: GA ČR(CZ) GA19-14237S; GA MŠMT(CZ) EF15_003/0000493
Institutional support: RVO:61388998
Keywords : additive manufacturing * nonlinear elasticity * nonlinear elastic wave spectroscopy (NEWS) * nonlinear resonantultrasound spectroscopy (NRUS) * nonlinear wave modulation spectroscopy (NWMS) * selective electron beam melting(SEBM)
OECD category: Mechanical engineering
Impact factor: 1.995, year: 2020
Method of publishing: Limited access
https://link.springer.com/article/10.1007/s10921-020-00731-z

Selective electron beam melting (SEBM) is an additive manufacturing process for the production of complex metallic parts.To optimize their mechanical properties, pores and fusion defects, since not completely avoidable, have to be detected andevaluated. The generated microstructure may contain not only voids, but also weak bonds, sharp interfaces and loose particlescausing nonlinear elasticity. This paper reports on Nonlinear Impact Modulation Spectroscopy (NIMS) experiments appliedto a set of Ti–6Al–4V samples, each of which contains an internal zone with well-defined porosity ranging from 0.2 to20%, respectively. Resonance spectra, attenuation and indicators of material nonlinearity were evaluated, which allowed thelocalization, dimensioning and assessment of porous zones. Properties of used linear and nonlinear methods are discussed
Permanent Link: http://hdl.handle.net/11104/0314647