Effect of Trace Ag and Mg Additions on Mechanical Properties and Microstructures of 2195 Alloy

Huang, Bei; Zheng, Zi Qiao; Yin, Denise; Mo, Zhuoqiang

doi:10.4028/www.scientific.net/msf.217-222.1239

Cited by 10 publications

(3 citation statements)

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“…Meanwhile, the shear strain of the θ′ is at (001) α /[100] α , while the shear strain of the T 1 is at (111) α /[112] α . Because the shear strain for T 1 is in the plane of the Burgers vector of dislocation in the aluminum matrix, i.e., (111) α planes, dislocations may thus have a greater effect on T 1 nucleation than that on θ′ nucleation [28][29][30][31]. In addition, both T 1 and θ′ exhibit similar interfacial energy [32].…”

Section: Phase Precipitation Behavior Analysismentioning

confidence: 99%

Effect of pre-deformation and artificial aging on fatigue life of 2198 Al-Li alloy

Zhang

Liang

et al. 2020

Mater. Res. Express

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The effects of pre-deformation and artificial aging on fatigue life of 2198 Al-Li alloy were explored to further reveal its fatigue behavior and improve the damage tolerance. Fatigue life was investigated on 2198-T3 alloy after pre-deformation and aging treatments. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to study the fracture morphology, precipitation behavior, fatigue crack initiation and propagation. Results indicated that T 1 (Al 2 CuLi) phase dominated the strengthening of 2198-T3 alloy after the further aging. Pre-deformation increased the number of dislocations in the matrix, which provided favorable position for nucleation of T 1 . The precipitation of θ′ (Al 2 Cu) and δ′ (Al 3 Li) were inhibited. Also, the formation and coarsening of precipitate-free zone (PFZ) were effectively avoided in this condition. Dislocation density in the 2198 Al-Li alloy matrix increased with the amount of pre-deformation, leading to an increase in microcrack defects on the surface and inside alloy. As a result, decreased fatigue life and an increased crack growth rate of the alloy were observed. Overall, 2198 Al-Li alloy had the best fatigue life and damage tolerance enhancement after it underwent 3% pre-deformation and was aged at 155°C for 15 h.

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Section: Phase Precipitation Behavior Analysismentioning

confidence: 99%

Effect of pre-deformation and artificial aging on fatigue life of 2198 Al-Li alloy

Zhang

Liang

et al. 2020

Mater. Res. Express

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“…In the T8 condition (stretched and artifically aged to peak strength) the primary strengthening precipitate in alloy 2195 is T1. The T 1 forms during ageing on the {111} lattice planes as thin, hexagonal plates 4 …”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…The T 1 forms during ageing on the {111} lattice planes as thin, hexagonal plates. 4 The friction stir welds were made at the University of South Carolina using a vertical milling machine and a typical friction stir welding tool. Critical tool dimensions include a 10-mm diameter pin and a 25-mm diameter shoulder.…”

Section: A T E R I a L A N D E X P E R I M E N T A L P R O C E D U R Ementioning

confidence: 99%

R‐curve behaviour of friction stir welds in aluminium‐lithium alloy 2195

Kröninger

Reynolds

2002

Fatigue Fract Eng Mat Struct

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The fracture resistance of friction stir welds in 2195‐T8 is described in this paper. R‐curves were produced for several crack planes, parallel to the welding direction and situated at varying distances from the weld centreline. The friction stir weld was also characterized by hardness and tensile testing. Fracture resistance of the friction stir weld is compared to the base metal and to a variable polarity plasma arc weld. Results show that the material in and around the friction stir weld is tougher than the base metal and the variable polarity plasma arc weld. The friction stir weld fracture performance is discussed in the light of the observed hardness and fractographic data presented.

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Structure and Mechanical Properties of High Strength Aluminium Alloys

Dutkiewicz

1998

Advanced Light Alloys and Composites

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Effect of Trace Ag and Mg Additions on Mechanical Properties and Microstructures of 2195 Alloy

Cited by 10 publications

References 0 publications

Effect of pre-deformation and artificial aging on fatigue life of 2198 Al-Li alloy

Effect of pre-deformation and artificial aging on fatigue life of 2198 Al-Li alloy

R‐curve behaviour of friction stir welds in aluminium‐lithium alloy 2195

Structure and Mechanical Properties of High Strength Aluminium Alloys

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