Martensitic stabilization and defects induced by deformation in TiNi shape memory alloys

Martensitic stabilization caused by deformation in a TiNi shape memory alloy was studied.Special attention was paid to the deformed microstructures to identify the cause of martensitic stabilization.Martensitic stabilization was demonstrated by differential scanning calorimetry for the tensioned TiNi shape memory alloy.Transmission electron microscopy revealed that antiphase boundaries were formed because of the fourfold dissociation of[110]B19'super lattice dislocations and were preserved after reverse transformation due to the lattice correspondence.Martensitic stabilization was attributed to dislocations induced by deformation,which reduced the ordering degree of the microstructure,spoiled the reverse path from martensite to parent phase compared with thermoelastic transformation,and imposed resistance on phase transformation through the stress field.     

大塑性变形制备超细晶生物医用钛合金的研究进展

生物医用钛合金具有高强度、良好的耐蚀性能、较低的弹性模量、优异的生物相容性,已成为具有广阔应用前景的医用金属材料之一.与传统医用钛合金相比,超细晶医用钛合金具有更高的强度与更好的疲劳性能以及耐腐蚀性能.此外,超细晶钛合金可诱导骨组织向内生长,增加界面结合强度,加快骨修复进程,在硬组织修复材料领域具有广阔的应用前景.阐述了各种大塑性变形（Severe Plastic Deformation）法制备超细晶生物医用钛合金的研究状况与最新进展,指出了SPD法制备医用钛合金中存在的技术问题和发展方向,并展望了利用SPD法对生物医用钛合金改性将成为生物医用材料的研究热点.     

板坯电渣重熔炉结晶器报废原因分析及改进措施

着重对舞钢公司40 t板坯电渣重熔炉结晶器的报废原因进行了分析研究,阐述了针对该类型结晶器所制定的维护、修复与报废标准,同时提出了延长结晶器使用寿命和降低结晶器使用成本方面的一些措施和设想展望。     

安钢小方坯连铸高效化改造

介绍了安阳钢铁集团有限公司（以下简称安钢）二炼小方坯基本情况,高效化改造的原因,所采取的主要技术措施,以及实施高效改造后取得的效果。     

ZL205A高强度铝铜合金的铸造及热处理

探讨了ＺＬＮ２０５Ａ高强度铝铜合金的铸造性能和热处理工艺方法，阐述了ＺＬ２０５Ａ铝铜合金在Ｔ５热处理时，如何才能达到机械性能的工艺方法。     

TiB2表面渗层材料的研究和应用现状

综述了国内外钛金属表面渗硼强化技术的研究及其应用现状,总结并对比了钛金属渗硼方法及相应渗层的组织结构和力学性能,提出了相应的改进方向,重点讨论了Ti-B系扩散机理研究成果,归纳出Ti-B系互扩散反应的基本规律,最后展望了TiB2表面渗硼材料的应用前景.     

Annealing process of fine grained co-stabilised (Y,Mg)-PSZ/MgAl2O4 ceramics

Abstract

Co-stabilised (Y,Mg) partially stabilised zirconia (PSZ) ceramics with MgAl₂O₄ spinel additions were produced, with industrial zirconia as the main starting material. Powders were prepared using a mechanical milling–mixing process. The effect of the annealing process on the mechanical properties, phase compositions, and microstructure of fine grained PSZ ceramics was investigated.     

Phase equilibria in the Au–In–Sn ternary system

Phase equilibria of the Au–In–Sn system have been investigated by Differential Scanning Calorimetry (DSC), metallographic examination, Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) measurements. The 130 ^°C isothermal section of the phase diagram was studied. The ternary diagram shows six three-phase fields, and one ternary Au₄In₃Sn₃ phase, which melts incongruently at 382 ^°C and shows a homogeneity range between 21 and about 30 at.% In, at constant Au/Sn ratio.     

ptp通讯在锌电解供电优化系统中的研究与应用

以提高锌电解供电系统的自动化程度、实现网络控制为目的,在分析了系统总体结构和控制原理的基础上,重点讨论了ptp通讯在系统中的研究与应用;ptp通讯网络以S7-300PLC为主站,以两台晶闸管数字触发器为从站,实现电流给定和触发角反馈等信号的传输,其通讯协议简单,开发成本低,与Profibus网一道组成的控制网抗干扰能力强,可靠性高,有力地保证了锌电解供电优化系统安全运行,为锌电解提高整流效率、节约电能提供了保障.     

浅谈辽宁气象影视发展的新空间

由于气候变化的复杂化,提升了人们对气象的关注,同时也提升了媒体对气象节目的争夺,气象影视部门想要生存,就要不断的开发新的发展空间来适应市场的需求,同时达到气象宣传的目的。