Effects of build orientation and heat treatments on the tensile and fracture toughness properties of additively manufactured AlSi10Mg

2021 ◽  
pp. 106868
Author(s):  
Luana C. Araújo ◽  
André H.G. Gabriel ◽  
Eduardo B. da Fonseca ◽  
Julian A. Avila ◽  
André L. Jardini ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Heat Treatments ◽  
Build Orientation

Mechanical Properties of a Novel High-Strength Aluminum-Lithium Alloy

2011 ◽  
Vol 689 ◽  
pp. 385-389 ◽  
Author(s):  
Zhi Shan Yuan ◽  
Zheng Lu ◽  
You Hua Xie ◽  
Xiu Liang Wu ◽  
Sheng Long Dai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Tensile Test ◽  
High Strength ◽  
Heat Treatments ◽  
Fracture Toughness Test ◽  
Aluminum Lithium Alloy ◽  
Toughness Test ◽  
Aluminum Lithium ◽  
Strength And Ductility

As a heat treatable aluminum alloy to be used in T6 and T8 temper, belongs to Al-Cu-Li system, a novel high-strength aluminum-lithium alloy 2A97 was developed. In order to improve the relationships of strength and ductility and fracture toughness, and to urge the applications in the aeronautical and aerospace industries, the effects of normal heat treatments and thermomechanical heat treatments on the mechanical properties and fracture toughness were investigated by Transmission Electron Microscope(TEM), Scanning Electronic Microscope (SEM), tensile test, and fracture toughness test. The results show that for the alloy aged at 135 °C for 24 h after quenching and 4 percent plastic deformation, its microstructures are strengthened by strain hardening and precipitation hardening, consisting of fine T1phase, θ″/θ′ phase and δ′ phase densely and homogeneously distributed in the matrix. It yields optimum relationship of strength and ductility, fracture toughness, its σ0.2, σband δ5are 454 MPa, 536 MPa, and 11.8%, respectively. It yields 43.5 MPa·m1/2of Kqvalues higher than that of 42.5 MPa·m1/2 in T6 temper. The fracture morphologies of impact tensile samples of fracture toughness test and normal tensile test were observed, indicating the dominance of intergranular failure and subintergranular failure with some dimples and trangranular failure.

Zirconia Dispersed Mullite Ceramics Through Hot-Pressing Of Amorphous ZrO 2 -SiO 2 -Al 2 O 3 Obtained by Rapid Quenching

1986 ◽  
Vol 78 ◽  
Author(s):  
Masahiro Yoshimura ◽  
Tatsuo Noma ◽  
Yasuhiro Hanaue ◽  
Shigeyuki Sōmiva
Keyword(s):  
Fracture Toughness ◽  
Hot Pressing ◽  
Glassy Phase ◽  
Amorphous Material ◽  
Rapid Quenching ◽  
Heat Treatments ◽  
Duplex Microstructure ◽  
Mullite Phase ◽  
Triple Points ◽  
Mullite Ceramics

ABSTRACTZirconia dispersed mullite ceramics were fabricated through hot-pressinq at a pressure of 25 MPa from the amorphous material of 2Owt%ZrO2-8Owt%(3Al2O3 2SiO2) obtained by rapid quenching of the melts. The densification was initiated at ∼950°C and accelerated by crystallization of mullite and t-ZrO2 to yield almost pore free samples about 1050°C. This sample seemed to contain Si02-rich glassy phase in addition to A12O3-rich mullite and t-ZrO2 The further heat-treatments with/without pressing brought about the reaction between the Si02-rich glassy phase and the A1203-rich mullite phase to yield nearly stoichiometric mullite. and growth of the mullite grains and the t-ZrO2 particles up to 1 u m in size at 1600°C. The TEM observation revealed a duplex microstructure of twinned m-ZrO2 at the triple points and fine t-ZrO2 in the center of the mullite grains. The fracture toughness of the specimen increased with hot-pressing temperatures up to 2.2 MPam1/2 in the samples at 1600°C.

On the correlation between fracture toughness and precipitation hardening heat treatments in 15-5PH Stainless Steel

2007 ◽  
Vol 14 (4) ◽  
pp. 626-631 ◽  
Author(s):  
M. Abdelshehid ◽  
K. Mahmodieh ◽  
K. Mori ◽  
L. Chen ◽  
P. Stoyanov ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Precipitation Hardening ◽  
Heat Treatments

LUMEN ALLOY 11-C

Alloy Digest ◽  
1955 ◽  
Vol 4 (10) ◽  
Keyword(s):  
Fracture Toughness ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Fatigue Resistance ◽  
High Strength ◽  
Heat Treating ◽  
Heat Treatments ◽  
Aluminum Bronze

Abstract LUMEN ALLOY 11-C is a high strength aluminum bronze having good wear and fatigue resistance. It responds to varying heat treatments. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: Cu-32. Producer or source: Lumen Bearing Company.

Effect of build orientation on fracture behaviour of AlSi10Mg produced by selective laser melting

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sultan AlRedha ◽  
Anton Shterenlikht ◽  
Mahmoud Mostafavi ◽  
Derreck Van Gelderen ◽  
Omar Eduardo Lopez-Botello ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Selective Laser Melting ◽  
Grain Orientation ◽  
Mechanical Performance ◽  
Bulk Material ◽  
Laser Melting ◽  
Content Type ◽  
Build Orientation ◽  
Melt Pool ◽  
Melting Pool

Purpose A key challenge found in additive manufacturing is the difficulty to produce components with replicable microstructure and mechanical performance in distinct orientations. This study aims to investigate the influence of build orientation on the fracture toughness of additively manufactured AlSi10Mg specimens. Design/methodology/approach The AlSi10Mg specimens were manufactured using the selective laser melting (SLM) technology. The fracture toughness was experimentally determined (under ASTM E399-09) using C(T) specimens manufactured in different orientations. The microstructure of the specimens was examined using metallography to determine the effects of grain orientation on fracture toughness. Findings The fracture toughness magnitude of manufactured specimens ranged between 36 and 50 MPam, which closely matched conventional bulk material and literature values regarding AlSi10Mg components. The C(T) specimens printed in the T-L orientation yielded the highest fracture toughness. The grain orientation and fracture toughness values confirm the anisotropic nature of SLM parts where the T-L-oriented specimen obtained the highest KIC value. A clear interaction between the melt pool boundaries and micro-slipping during the loading application was observed. Originality/value The novelty of this paper consists in elucidating the relationship between grain orientation and fracture toughness of additively manufactured AlSi10Mg specimens because of the anisotropy generated by the different melting pool boundaries and orientations in SLM. The findings show that melt pool boundaries can behave as easier pathways for cracks to propagate and subsequently reduce the fracture toughness of specimens with cracks perpendicular to the build direction.

Wear of Ductile-Phase Toughened NiAl

1994 ◽  
Vol 364 ◽  
Author(s):  
F.E. Kennedy ◽  
I. Baker ◽  
B.J. Johnson
Keyword(s):  
Fracture Toughness ◽  
Intermetallic Compounds ◽  
Room Temperature ◽  
Wear Behavior ◽  
Heat Treatments ◽  
Material System ◽  
Ductile Phase ◽  
Pin On Disk ◽  
The Relationship

AbstractThe purpose of this work was to study the effect of ductile phases on the wear of brittle intermetallic compounds. The material system of interest was NiAl with an incorporated ductile Fe phase. Three different compositions were studied: Fe10Ni45Al45, Fe30Ni35Al35, and Fe44Ni28Al28, each after two different heat treatments. Their wear behavior in unlubricated sliding against zirconia was investigated using pin-on-disk tests at room temperature in air. Hardness and fracture toughness tests were run for the same materials to clarify the relationship between wear and deformation. Results for the ductile-phase toughened materials were compared with results of similar tests for unalloyed NiAl.

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