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Microstructural homogeneity and mechanical behavior of a selective laser melted Ti-35Nb alloy produced from an elemental powder mixtureJincheng Wang1,2,Yujing Liu2,Chirag Dhirajlal Rabadia1,Shun-Xing... and chemical homogeneity of the produced parts. Hence, this work investigates the microstructure and mechanical properties of a SLM-produced Ti-35 Nb composite(in wt%) using elemental powder......
V-N微合金化高强度球扁钢截面均匀性研究陈雪慧1,杨才福1,张倩1,苏航1(1.北京市钢铁研究总院结构材料研究所)摘 要:针对高强度球扁钢截面性能不均匀的特点,采用金相显微镜,透射电镜,相分析等试验分析方法,研究了V-N微合金化对其截面性能均匀性的影响.结果表明,V-N微合金化技术改善了球扁钢的截面性能均匀性,显著提高了球头心部的性能,这和V在球扁钢不同部位的不同析出行为密切相关.球头心部比其他部位具备更充分的V(C,N)析出动力学条件,析出强化效果更明显,弥补了因组织差异带来的强度损失,减小了截面性能差异.<......
(EMS) process parameters on microstructure and radial homogeneity of large-volume (slurry maker of diameter d180 mm, more than 5kg every time) semi-solid slurry of 7A04 aluminum alloy was studied... at the center and the edge. As the frequency increases, the microstructure homogeneity of the semi-solid slurry decreases; the primary α(Al) particles of the semi-solid slurry is finer at higher......
规回归再时效处理的提高约50%. 关键词:7055铝合金；中厚板；非等温回归；再时效；均匀性 中图分类号:TG146.2 文献标志码:A Effect of non-isothermal retrogression and re-ageing on through-thickness homogeneity of microstructure..., Central South University, Changsha 410083, China) Abstract: The effect of matching relationship between retrogression heating and cooling rate on the microstructure homogeneity and through-thickness......
-hao, LIU Jin-tao, SI Bo-yang. Effect of mixing time on homogeneity of high fluidity fresh concrete[J]. Concrete, 2018(11):86-89+109. [25] YANG L, WANG H, WU A, LI H, TCHAMBA A, ZHOU X, WANG T. Effect of mixing time on hydration kinetics and mechanical property of cemented paste backfill[J]. Construction and Building Materials, 2020(247):1-9. The effect of mixing time on the homogeneity and early......
-hao, LIU Jin-tao, SI Bo-yang. Effect of mixing time on homogeneity of high fluidity fresh concrete[J]. Concrete, 2018(11):86-89+109. [25] YANG L, WANG H, WU A, LI H, TCHAMBA A, ZHOU X, WANG T. Effect of mixing time on hydration kinetics and mechanical property of cemented paste backfill[J]. Construction and Building Materials, 2020(247):1-9. The effect of mixing time on the homogeneity and early......
on microstructure and mechanical property homogeneity of BFe10-1-1 cupronickel tube produced by HCCM horizontal continuous castingJIANG Yan-bin1,2,LIU Xian-gai1,ZHANG Xiao-jun1,XIE Jian-xin1,2(1. Key Laboratory... Transportation,University of Science and Technology Beijing,Beijing 100083,China)Abstract:A method of setting air-gap thermal resistance at the bottom of cooling mold was proposed to improve the homogeneity......
on the strain distribution. The friction between die and workpiece is detrimental to strain homogeneity, thus the friction should be decreased. In order to improve the strain homogeneity, a large corner radius and a low extrusion angle should be used. Key words: cyclic extrusion and compression; finite element method; friction; ZK60 magnesium alloy; strain homogeneity 1 Introduction As one kind......
转模等通道转角挤压路径对AZ31镁合金组织和力学性能的影响严凯1,孙扬善1,白晶1,薛烽1(1.江苏省南京市东南大学材料科学与工程学院)摘 要:利用3D转模等通道转角挤压(3D-RD ECAP)设备,对AZ31镁合金进行了A′,B′A,B′C与C′4种路径的ECAP实验.对试样的显微组织观察显示,经4种路径挤压后合金显微组织都明显细化,但不同路径对微观组织和力学性能的影响不同.经A′和B′A路径挤压的试样组织中晶粒尺寸和硬度分布比其它两种路径挤压的试样更均匀,且显示出更高的塑性.通过对各种路径挤压过程中试样内部......
