Acta Metallurgica Sinica (English Letters)

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Low-Cycle Fatigue and Creep-Fatigue Behaviors of a Second-Generation Nickel-Based Single-Crystal Superalloy at 760 °C
Acta Metallurgica Sinica (English Letters) - Tập 33 - Trang 1423-1432 - 2020
Jian Zhang, Yuan-Yuan Guo, Mai Zhang, Zhen-Yu Yang, Yu-Shi Luo
Low-cycle fatigue (LCF) behaviors of a second-generation nickel-based single-crystal superalloys with [001] orientation at 760 °C have been investigated. Different strain amplitudes were introduced to investigate the creep-fatigue effects. The LCF life of none tensile holding (NTH) was higher than that of the 60-s tensile hold (TH) at any strain amplitude. As the strain amplitude was 0.7%, the sta...... hiện toàn bộ
Effect of Carbon Migration on Interface Fatigue Crack Growth Behavior in 9Cr/CrMoV Dissimilar Welded Joint
Acta Metallurgica Sinica (English Letters) - - 2021
Qi Wang, Chendong Shao, Haichao Cui, Yuan Gao, Fenggui Lu
Fatigue crack growth (FCG) behavior of 9Cr/CrMoV dissimilar welded joint at elevated temperature and different stress ratios was investigated. Attention was paid to the region near the fusion line of 9Cr where carbon-enriched zone (CEZ) and carbon-depleted zone (CDZ) formed due to carbon migration during the welding process. Hard and brittle tempered martensite dominated the stress ratio-insensiti...... hiện toàn bộ
Correlation Between Dynamic Compressive Strength and Fracture Behaviors of Bulk Metallic Glasses
Acta Metallurgica Sinica (English Letters) - Tập 33 - Trang 1407-1415 - 2020
Wenqing Li, Zhengwang Zhu, Guojie Li, Long Zhang, Zhengkun Li, Huameng Fu, Hongwei Zhang, Hong Li, Aimin Wang, Haifeng Zhang
The mechanical behaviors of Zr43.5Cu43.5Ni4Al8Nb1, Zr55.4Cu31.6Ni4Al8Nb1, Ti32.8Zr30.2Ni5.3Cu9Be22.7 (at.%) metallic glass at different strain rates were studied. For all the present alloys, the dispersion over 700 MPa was observed on the strength in the repeated dynamic compressions, which was much stronger than that of the quasi-static compressive strength. Such the dispersion of the dynamic com...... hiện toàn bộ
Đặc trưng hành vi biến dạng nhiệt độ cao của hợp kim Al–Cu–Li mới bằng cách sử dụng bản đồ chế biến Dịch bởi AI
Acta Metallurgica Sinica (English Letters) - Tập 28 Số 7 - Trang 817-825 - 2015
Yu, Xin-Xiang, Zhang, Yi-Ran, Yin, Deng-Feng, Yu, Zhi-Ming, Li, Shu-Fei
Hành vi biến dạng nén đẳng nhiệt của hợp kim Al–Cu–Li có tỷ lệ trọng lượng Cu/Li cao đã được nghiên cứu dưới các điều kiện biến dạng khác nhau. Các thử nghiệm nén đẳng nhiệt được thực hiện trong khoảng nhiệt độ từ 300 đến 500 °C và tỷ lệ biến dạng từ 0.001 đến 10 s−1. Kết quả cho thấy rằng mức căng tối đa giảm khi nhiệt độ tăng và tỷ lệ biến dạng giảm, điều này được thể hiện bởi tham số Zener–Holl...... hiện toàn bộ
#hợp kim Al–Cu–Li #biến dạng nén đẳng nhiệt #tính mềm nóng #bản đồ chế biến #tái kết tinh động
Fabrication, Microstructure and Mechanical Properties of in situ GNPs Reinforced Magnesium Matrix Composites
Acta Metallurgica Sinica (English Letters) - - 2024
Peitang Zhao, Xuejian Li, Hailong Shi, X.S. Hu, Chunlei Zhang, Chao Xu, Xiaojun Wang
Laves Phase Formation and Its Effect on Mechanical Properties in P91 Steel
Acta Metallurgica Sinica (English Letters) - Tập 28 - Trang 1238-1246 - 2015
Zhi-Xin Xia, Chuan-Yang Wang, Yan-Fen Zhao, Guo-Dong Zhang, Lu Zhang, Xin-Ming Meng
Effect of Laves phase formation on mechanical properties in a pressurized T-junction of P91 steel pipe at 849 K for 58,000 h with 25.65 MPa vapor pressure was studied. Thermodynamic calculations had been performed by using the software Thermo-Calc to study the phase at equilibrium state. Counter plot of von Mises stress in the pipe during service life was calculated by finite element analysis to s...... hiện toàn bộ
Different Mechanisms of ε-M and α′-M Variant Selection and the Influencing Factors of ε-M Reversion During Dynamic Tension in TRIP Steel
Acta Metallurgica Sinica (English Letters) - Tập 31 Số 5 - Trang 449-455 - 2018
Lina Wang, Ping Yang, Tao Jin, Weimin Mao
Reveal Hydrogen Behavior at Grain Boundaries in Fe–22Mn–0.6C TWIP Steel via In Situ Micropillar Compression Test
Acta Metallurgica Sinica (English Letters) - - 2023
Xu Lu, Dong Wang, Di Wan, Xiaofei Guo, Roy Johnsen
AbstractIn this study, the effect of hydrogen on dislocation and twinning behavior along various grain boundaries in a high-manganese twinning-induced plasticity steel was investigated using an in situ micropillar compression test. The compressive stress in both elastic and plastic regimes was increased with the presence of hydrogen. Further investigation by transm...... hiện toàn bộ
Kinetics and Morphological Analysis of Silver Platinum Bimetallic Nanoparticles
Acta Metallurgica Sinica (English Letters) - - 2016
Fredrick Okumu, Mangaka Matoetoe
Kinetics of a one-pot core–shell synthesis of bimetallic (BM) silver–platinum (Ag–Pt) nanoparticles (NPs) by simultaneous reduction of 1:1 mol fraction of precursors H2PtCl6·6H2O and AgNO3 in aqueous solution is reported. Kinetics analysis was done by plotting UV–visible absorptions versus reaction time with a first-order fitting. Recorded constants of Ag NPs (0.079 s−1), Ag–Pt NPs 1:1 (0.082 s−1)...... hiện toàn bộ
Orientation-Dependent Characteristics for Residual Grains during Hot Deformation of Nickel-Based Alloy 925
Acta Metallurgica Sinica (English Letters) - Tập 34 - Trang 1296-1306 - 2021
Yulong Zhu, Yu Cao, Rui Luo, Cunjian Liu, Hongshuang Di, Gang Shu, Guangjie Huang, Qing Liu
In the present work, the orientation characteristics of residual grains during hot deformation of an age-hardening Ni-Fe-Cr alloy (Alloy 925) at different conditions were systematically analyzed through high-resolution electron back-scatter diffraction. Based on the measurement of the kernel average misorientation, the density of geometrical necessary dislocations (GNDs) was further calculated. Th...... hiện toàn bộ
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