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| 1 | Morphologies of Al_4Sr Intermetallic Phase and Its Modification Property upon A356 Alloys显示文摘In general,the modification performance of Al-Sr master alloys is primarily dependent upon the morphologies and sizes of the Al_4Sr intermetallic phase.In this paper,the crystal structure,morphologies,sizes,hardness and elastic modulus of Al_4Sr in Al-Sr master alloys prepared from variant processes were studied by means of optical metallurgical microscope,X-ray diffraction(XRD),scanning electron microscopy(SEM),and nanoindentation system.The results revealed that the microstructures and modification performance of the Al_4Sr phase were related to the preparation processes.That is to say,when a 'direct reaction-hot extrusion' process was used,the Al_4Sr phase exhibited a homogeneous distribution in the Al matrix with small size and roundish shapes,which ensured the Al-Sr master alloy wire advantages involving high recovery,good reproducibility,no delitescence of modification,no corrosion on equipments,and good workability.However,in the case of the traditional 'direct reaction' process,the Al4Sr phase was in large size with shapes of rectangular stripe and plates,which limited the Sr content increasing due to the brittleness of the Al-Sr alloy.It was also found that the morphology and size of the Al_4Sr phases changed during heat treatment at high temperature up to 600 ℃. | Chengwei Liao Jianchun Chun Yang Li Rui Tu Chunxu Pan | 2012 | Journal of Materials Science & Technology2012，28，6： | 7 |
| 2 | Modification performance on 4032 Al alloy by using Al–10Sr master alloys manufactured from different processes显示文摘The microstructures and modification performance on 4032 aluminum alloy of the Al–10Sr master alloy wire prepared from 'direct reaction-hot extrusion' and the trapezoidal block from 'direct reaction' were systemically studied by using optical metallurgical microscope, XRD and SEM. It was found that the preparation processes exhibited a significant effect on the microstructures of the Al–10Sr, which thereby influenced its modification performance. It has been found that when the Al–10Sr alloy wire was used, a desirable modification was obtained after 2 min and reached to the best performance at 60 min, and the optimum Sr addition amount was 0.04–0.06 wt%, and the good modification performance was kept even after 300 min. However, when the Al–10Sr alloy trapezoidal block was used, a desirable modification was started after 30 min and reached to the best performance as long as 120 min, and the optimum Sr addition amount was 0.06–0.08 wt%, and the effective modification period was only180 min. Therefore, comparing with the Al–10Sr alloy trapezoidal block, the Al–10Sr alloy wire had better modification efficiency, which not only reduced the Sr addition amount of about 30%, but also greatly decreased the incubation time and improved the ability of anti-fading. | Chengwei Liao Jianchun Chen Yunlong Li Huan Chen Chunxu Pan | 2014 | Progress in Natural Science:Materials International2014，24，2： | 6 |
| 3 | The Pumilio RNA-binding protein APUM24 regulates seed maturation by fine-tuning the BPM-WRI1 module in Arabidopsis显示文摘Pumilio RNAbindingproteinsparticipateinmes-senger RNA(mRNA)degradation and t ranslational repression,but their roles in plant development are largely unclear.Here,we show that Arabidopsis PUMILIO PROTEIN24(APUM24),an atypical Pumiliohomology domaincontaining protein,plays an im-portant part in regulating seed maturation,a major stage of plant development.APUM24 is strongly expressed in maturing seeds.Reducing APUM24 expression resulted in abnormal seed maturation,wrinkled seeds,and lower seed oil contents,and APUM24 knockdown resulted in lower levels of WRINKLED 1(WRI1),a key transcription factor con-trolling seed oil accumulation,and lower expression of WRI1 target genes.APUM24 reduces the mRNA stability of BTB/POZMATH(BPM)family genes,thus decreasing BPM protein levels.BPM is responsible for the 26S proteasomemediated degradation of WRI1 and has important functions in plant growth and development.The 3′untranslated regions of BPM family genes contain putative Pumilio response elements(PREs),which are bound by APUM24.Re-duced BPM or increased WRI1 expression rescued the decient seed maturation of apum242 knock-down mutants,and APUM24 overexpression re-sulted in increased seed size and weight.Therefore,APUM24 is crucial to seed maturation through its action as a positive regulatornetuning the BPMWRI1 module,making APUM24 apromising target for breeding strategies to increase crop yields. | Ruihua Huang Mengling Liu Guanping Gong Pingzhi Wu Barunava Patra Ling Yuan Hongting Qin Xiaoxu Wang Guohe Wang Huimei Liao Lu Gao Chengwei Yang Hongqing Li Shengchun Zhang | 2021 | Journal of Integrative Plant Biology2021，63，7： | 2 |
| 4 | Microstructure of Al4Sr Phase in Al-Sr Master Alloy and its Effect on Modification Properties显示文摘 | Chengwei Liao Jianchun Chen Chunxu Pan | 2012 | Procedia Engineering2012，，： | 1 |
| 5 | Microstructure of AI4Sr phase in AI-Sr master alloy and its effect on modification properties 显示文摘 | Liao Chengwei Chela Jianchun Pan Chunxu | 2011 | SCI Verse Science Direct2011，27，： | 1 |
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