Microstructure and mechanical property of laser melting deposition (LMD) Ti/TiAl structural gradient material

Chemical analysis, structure and mechanical properties of discrete and compositionally graded SS316–IN625 dual materials

“…In thermal barrier coated alloys subjected to fast heating or thermal cycling, mismatch of thermophysical properties between the substrate and the coating may lead to generation of thermal stresses and, hence, compositionally graded materials may perform better than discrete coated materials. The family of laser freeform fabrication techniques is found to be promising for the fabrication of FGMs, since they are built by successive deposition, melting and solidification of layers of varying compositions [1]. Laser Engineered Net Shaping (LENS) is one of the laser freeform fabrication techniques used to build functional parts directly from 3D CAD model [2].…”

Characterization of (TiB+TiC)/TC4 in situ titanium matrix composites prepared by laser direct deposition

“…Laser direct deposition process, also named as laser engineered net shaping (Baneejee et al, 2005(Baneejee et al, , 2003, direct laser fabrication (Wang et al, 2008(Wang et al, , 2007, direct light fabrication, laser melting deposition (Qu et al, 2010), laser consolidation, etc., can produce fully dense functional components through laser melting metallic powder or wire and additively depositing in a manner of layer-bylayer. This process allows a high degree of flexibility in the control of the deposited part's geometry, composition, microstructure and properties, which shows good prospects in fabricating rib-on-web structures from titanium alloy for the aeronautical industry and repairing some high-value components.…”

“…This process allows a high degree of flexibility in the control of the deposited part's geometry, composition, microstructure and properties, which shows good prospects in fabricating rib-on-web structures from titanium alloy for the aeronautical industry and repairing some high-value components. Recently this process was used to develop functional gradient materials by Qu et al (2010), new materials by Brice and Fraser (2003), as well as in situ TMCs by Baneejee et al (2005Baneejee et al ( , 2003 and Wang et al (2008Wang et al ( , 2007. Baneejee et al (2005Baneejee et al ( , 2003 prepared in situ Ti-6Al-4V-TiB composites using laser engineered net-shaping process with focus on microstructure characterization.…”

Frictional shear induced modification of the mechanical properties of TiAl(Nb) intermetallics near the surface

“…The mechanical properties of titanium alloys are predominantly determined by the chemical composition as well as the corresponding microstructure [1][2][3][4][5][6][7][8][9][10][11]. Therefore, a detailed characterization of titanium aluminides (Ti-Al) is essential in order to understand the link between the processing, microstructure and mechanical performance, with a focus on the meso-to nanoscale.…”

“…The bulk mechanical properties of the intermetallic TiAl alloy, correlated with the microstructure and also different strengthening effects, have been extensively studied by many authors [1][2][3][4][5][6][7][8][9][10][11]. Appel et al [13] have reported the deformation mechanism of such alloys.…”