A quench sensitivity study on the novel Al–Li–Cu–X alloy AF/C 458

Gable, Brian M.; Csontos, A.; Starke, E.A.

doi:10.1016/s1471-5317(02)00024-x

Cited by 31 publications

(22 citation statements)

References 16 publications

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“…In fact, T1 precipitation dominates that of the other phases, h¢/h¢ and d¢, in competition for solute (Cu and Li) when heterogeneous nucleation sites are available. [8] Then, reprecipitation of d¢ takes place during post-FSP heat treatment (Figure 3(c)). …”

Section: Discussionmentioning

confidence: 99%

“…[6,7] Each of these strengthening phases competes for nucleation sites and the Cu and Li solutes. [8] The Zr affects precipitation kinetics and is added in combination with Mg to enhance the agehardening response as well as toughness and corrosion resistance. [4] Also, the Zr additions lead to the formation of coherent b¢(Al 3 Zr) dispersoids that inhibit recrystallization during hot rolling and lead to formation of pancake-shaped grains.…”

mentioning

confidence: 99%

“…Alloy development has also focused on controlling microstructural evolution to reduce grain boundary precipitation and limit inhomogeneities such as coarse constituents or precipitate-free zones (PFZs). [8] AA2099 is one such alloy; it is precipitation hardened by h¢, T1, b¢, and d¢ phases. The h¢ phase is a semicoherent precipitate with a tetragonal structure that grows as thin plates on the {001}a planes, whereas the hexagonal T1 platelets appear on the {111}a.…”

mentioning

confidence: 99%

“…[4] The d¢ phase nucleates and grows on Guinier-Preston (GP-I) zones. [8,11,12] In the present study, the potential for further property improvements through friction stir processing (FSP) of wrought AA2099 has been examined. This method is an adaptation of friction stir welding and involves use of a cylindrical wear-resistant tool that has a larger diameter shoulder and a concentric smaller-diameter pin.…”

mentioning

confidence: 99%

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The Effect of Friction Stir Processing on the Microstructure and Mechanical Properties of an Aluminum Lithium Alloy

Giles

Oh-ishi

Zhilyaev

et al. 2008

Metall Mater Trans A

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Friction stir processing (FSP) was conducted on a wrought plate of AA2099 to refine and homogenize the microstructure and enhance the through-thickness ductility and fracture resistance. Optical microscopy (OM), orientation imaging microscopy (OIM), and transmission electron microscopy (TEM) methods were employed to evaluate microstructure and microtexture in as-received material and in material subjected to FSP as well as postprocessing heat treatments. Hardness and orientation-dependent tensile test data were combined with anticlastic bending fatigue data to characterize the as-received, processed, and processed and heat-treated conditions of the material.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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The Effect of Friction Stir Processing on the Microstructure and Mechanical Properties of an Aluminum Lithium Alloy

Giles

Oh-ishi

Zhilyaev

et al. 2008

Metall Mater Trans A

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“…A set of test pieces was solution heat treated at 480 °C for 2 h, water quenched (SHTWQ) then pre-strained for 8% in tension. The test samples were aged at 140 °C for 0.5, 1,2,3,4,6,8,10,12,24, 48, 72 and 96 h in a furnace. The other set of test samples were solution heat treated at 480 °C for 2 h, quenched in sand (SHTSQ) then pre-strained for 8% in tension.…”

mentioning

confidence: 99%

Effect of Quenching Rate and Pre-strain on the Strain Ageing Behaviors of 7075 Aluminum Alloys

Kaçar

Güleryüz

2015

Mat. Res.

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The mechanical properties of aluminum alloys are strongly dependent on the thermo-mechanical process so, the strain ageing behavior of 7075 Al-alloy was investigated in this study. A set of test pieces was solution heat treated at 480 °C for 2 h, water quenched (SHTWQ) then pre-strained for 8% in tension. The test samples were aged at 140 °C for 0.5, 1,2,3,4,6,8,10,12,24, 48, 72 and 96 h in a furnace. The other set of test samples were solution heat treated at 480 °C for 2 h, quenched in sand (SHTSQ) then pre-strained for 8% in tension. They were also aged at 140 °C for same intervals. The effect of strain ageing, on the mechanical properties of Al-alloy, was investigated by mean of hardness, and tensile tests. The results shown that, the quenching rate after solution heat treatment, ageing time and temperature, as well as pre-strain, play a very important role in the precipitationhardening associated with ageing process of the 7075 Al-alloy.

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Effect of Double Aging on the Toughness and Precipitation Behavior of a Novel Aluminum-Lithium Alloy

Liang

et al. 2015

J. of Materi Eng and Perform

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Precipitation behavior and mechanical properties of a novel aluminum-lithium alloy were investigated during a double-aging treatment to obtain superior combination of strength and plasticity. The double-aging process, involving subsequent high to low temperature treatments, was applied to strengthen the alloy. Transmission electron microscopy was used to characterize the precipitation behavior of the alloy, while tensile and tear tests were performed to evaluate the mechanical properties. The results indicated that the samples double aged at (165°C, 10 h) + (140°C, 35 h) possessed a desired combination of strength, plasticity, and toughness. T 1 phases were observed to nucleate preferentially at the defects during the first (primary) aging step. During the second (secondary) step of aging, these phases grew further and promoted the formation of new precipitates. Compared to the single-aging treatment, the double-aging treatment effectively prevents coarsening of T 1 , which is beneficial in improving the plasticity and toughness of the alloy.

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A quench sensitivity study on the novel Al–Li–Cu–X alloy AF/C 458

Cited by 31 publications

References 16 publications

The Effect of Friction Stir Processing on the Microstructure and Mechanical Properties of an Aluminum Lithium Alloy

The Effect of Friction Stir Processing on the Microstructure and Mechanical Properties of an Aluminum Lithium Alloy

Effect of Quenching Rate and Pre-strain on the Strain Ageing Behaviors of 7075 Aluminum Alloys

Effect of Double Aging on the Toughness and Precipitation Behavior of a Novel Aluminum-Lithium Alloy

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