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Strengthening and stress drop of ultrafine grain aluminum after annealing REN Jiang-wei(任江伟)1, SHAN Ai-dang(单爱党)2 1. School of Materials Engineering, Shanghai University of Engineering Science... decreases by over 50%, the recovery of dislocations may be the main cause of annealing strengthening. In addition, there is an abrupt stress drop in the tensile curves of annealed aluminum......
Influence of Sc on high temperature strengthening behavior of Ti-6Al-4V alloy LIU Hui-qun(刘会群)1, YI Dan-qing(易丹青)1, WANG Wei-qi(王韦琪)2, WANG Li-ping(王立平)2, LIAN Cai-hao(廉才浩)1 1. School... was started in β-phase region and finished in high (α+β)-phase region. Annealing after forging was performed in low (α+β)-phase region for 30 min. Isothermal high temperature compression tests were conducted......
J. Cent. South Univ. (2021) 28: 1978-1989 DOI: https://doi.org/10.1007/s11771-021-4746-2 Annealing twin mechanism for 304 stainless steel solution treatment process JI Kai-sheng(纪开盛)1, SONG Guang... parent grains, and twelve kinds of misorientations can be formed between the austenite parent grains and the secondary twins. Key words: 304 stainless steel; texture; annealing twin; secondary twin; grain......
Influence of annealing treatment on properties and microstructures of alumina dispersion strengthened copper alloy SONG Ke-xing(宋克兴)1, 2, XING Jian-dong(邢建东)1, TIAN Bao-hong(田保红)2,LIU Ping(刘 平... and electrical conductivity measurements and microstructure observation on the produced 0.12%ADSC (0.24% Al2O3, mass fraction) and 0.25%ADSC (0.50% Al2O3) subjected to different annealing treatments were......
铸态Al-Mg-Sc-Zr合金退火过程中的硬化行为杜刚1,杨文1,闫德胜1,戎利建1(1.辽宁省沈阳市科学院金属研究所)摘 要:采用透射电镜,电子探针,拉伸和硬度测试等方法对铸态Al-6Mg-0.2Sc-0.15Zr(质量分数,%)合金在等温退火过程中的硬化行为进行了研究.结果表明,退火过程中Mg分布的变化对合金强度影响不大,细小,弥散的Al3(Sc,Zr)沉淀相的析出产生了显著的沉淀强化作用.合金在300℃下退火,Al3(Sc,Zr)沉淀相粗化速率较慢,经过24 h处理后其直径为5 nm,合金屈服强度相对退火......
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识码:A Annealing hardening of nanocrystalline Ni-Fe alloy coatings synthesized by brush plating using soluble anode DAI Pin-qiang, CHEN Xiao-wen, XIANG Zhong-nan, XU Wei-chang (College of Materials... with increasing annealing temperature and reaches a peak value at 200 ℃, showing a significant hardening during annealing. With further increasing annealing temperature, the microhardness decreases......
J. Cent. South Univ. (2018) 25: 961-975 DOI: https://doi.org/10.1007/s11771-018-3797-5 Effect of annealing treatment on microstructure and fatigue crack growth behavior of Al–Zn–Mg–Sc–Zr alloy CHEN... (EBSD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), tensile and fatigue crack growth rate tests to explore the influence of annealing treatment on microstructure......
Properties and Strengthening Mechanism of Brush Plated Nanoparticle Reinforced Composite Coatings XU Bin-shi1,TU Wei-yi1,DONG Shi-yun1,Ma Shi-ning1 (1.National Key Laboratory for Remanufacturing.... Hardness, wear resistance and contact-fatigue resistance of the composite coatings were determined, and strengthening mechanism of the composite coatings was discussed. Results showed......
from slip-dominated deformation to twin-dominated deformation, and the mechanism is twin strengthening. With the increase of annealing temperature, dislocation density and hardness of GH3625...变为穿晶型,且退火孪晶发生长大(如图5所示). 图5 不同退火温度下GH3625合金管材的显微组织 Fig. 5 Microstructures of GH3625 superalloy tube at different annealing temperatures 图6所示为退火工艺为(1100 ℃,1 h,AC)试样的SEM像.由图6可知,冷变形GH3625合金管材......