The diffraction patterns from β″ precipitates in 12 orientations in Al–Mg–Si alloy

Yang, Wenchao; Wang, Mingpu; Zhang, Ruirong; Zhang, Qian; Sheng, Xiaofei

doi:10.1016/j.scriptamat.2010.01.039

Cited by 97 publications

(37 citation statements)

References 11 publications

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“…Meanwhile, some typical "cross-shaped" diffraction streaks were observed in the corresponding [001] Al SADP, which were marked by the circle in the image. These "cross-shaped" diffraction streaks had been identified from the 12 variants of β″ precipitates in our previous research [9].…”

Section: Microstructural Evolutionmentioning

confidence: 67%

“…The clusters/GP zones are found as the aggregates of solute atoms with full coherency in the Al matrix. During the subsequent artificial aging, these clusters/GP zones serve as nucleation sites for β″ phase, which displays the needleshaped morphology along three <100> Al directions [9]. Then the β′ and Q′ phases are formed with rod-shaped morphology [10].…”

Section: Introductionmentioning

confidence: 99%

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Initial precipitation and hardening mechanism during non-isothermal aging in an Al–Mg–Si–Cu 6005A alloy

Yang¹,

Ji²,

Huang³

et al. 2014

Materials Characterization

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The characterization of precipitation and hardening mechanism during non-isothermal aging had been investigated using high resolution transmission electron microscopy for an Al-Mg-Si-Cu 6005A alloy. It was proposed that the needle-shaped β″ precipitates with a three-dimension coherency strain-field and an increased number density in the Al matrix provided the maximum strengthening effect for the Al-Mg-Si-Cu 6005A alloy. Simultaneously, it was also found that the formation and evolution of clusters in the early precipitation were associated with the vacancy binding energy, during which Si atoms played an important role in controlling the numbers density of Mg/Si co-clusters, and the excess Si atoms provided the increased number of nucleation sites for the subsequent precipitates to strengthen and improve the precipitation rate. Finally, based on the experimental observation and theoretical analysis, the precipitation sequence during the early precipitation in the Al-Mg-Si-Cu 6005A alloy was proposed as: supersaturated solid solution → Si-vacancy pairs, Mg-vacancy pairs and Mg clusters → Si clusters, and dissolution of Mg clusters → Mg atoms diffusion into the existing Si clusters → Mg/Si co-clusters → GP zone.

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Section: Microstructural Evolutionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Initial precipitation and hardening mechanism during non-isothermal aging in an Al–Mg–Si–Cu 6005A alloy

Yang¹,

Ji²,

Huang³

et al. 2014

Materials Characterization

Self Cite

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show abstract

“…2d, where the corresponding FFT pattern from one precipitate was inserted at the upper right corner. It was found that, in addition to the diffraction patterns from the Al matrix, some weak diffraction spots were also detected in the FFT pattern, which was similar to that from b 00 phase [11]. However, no clear periodic lattice streaks could be observed in the HRTEM image, which indicated that this precipitate might not be the b 00 phase.…”

Section: Resultsmentioning

confidence: 89%

Grain boundary precipitation induced by grain crystallographic misorientations in an extruded Al–Mg–Si–Cu alloy

Yang

Zhou

et al. 2015

Journal of Alloys and Compounds

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a b s t r a c tThe grain boundary precipitation induced by grain crystallographic misorientations in an extruded Al-Mg-Si-Cu alloy was investigated by electron back-scattering patterns and high resolution transmission electron microscopy. The results showed that compared with the recrystallization cube {1 0 0}h0 01i texture, the deformation brass {1 1 0}h1 1 2i texture prevailed in the microstructure. The brass texture mainly contributed for the formation of low angle grain boundaries, where the pre-b 00 /b 0 phases were formed during precipitation. The recrystallization cube texture predominately induced the formation of high angle grain boundaries, where the Q 0 /Q phases related to the corrosion were precipitated. And, high and low grain boundary was 23.5% and 76.5% proportion in the microstructure, respectively. Finally, it was believed that in order to improve the resistance to intergranular corrosion of alloy, the recrystallization cube {1 0 0}h0 01i texture should be inhibited as far as possible.

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“…For a complicated mixing electron diffraction patterns, Transition Matrix can be used as a very useful tool in analysing it, which has been successfully applied in SADP from b 00 , b 0 and Q 0 precipitates with 12 variants in Al-Mg-Si alloys [19][20][21]. Generally, three sets of parallel crystal planes are first needed to establish the Transition Matrix.…”

Section: Variantsmentioning

confidence: 99%

Precipitation behaviour of Al–Zn–Mg–Cu alloy and diffraction analysis from η′ precipitates in four variants

Yang

Wang

et al. 2014

Journal of Alloys and Compounds

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151

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The diffraction patterns from β″ precipitates in 12 orientations in Al–Mg–Si alloy

Cited by 97 publications

References 11 publications

Initial precipitation and hardening mechanism during non-isothermal aging in an Al–Mg–Si–Cu 6005A alloy

Initial precipitation and hardening mechanism during non-isothermal aging in an Al–Mg–Si–Cu 6005A alloy

Grain boundary precipitation induced by grain crystallographic misorientations in an extruded Al–Mg–Si–Cu alloy

Precipitation behaviour of Al–Zn–Mg–Cu alloy and diffraction analysis from η′ precipitates in four variants

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