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Thermomechanical behavior of amorphous alloys based on titanium at the temperature range of the glass transition and crystallization
Materials Science and Engineering: A ( IF 6.1 ) Pub Date : 2018-11-16 , DOI: 10.1016/j.msea.2018.11.071
A. Sypien , G. Garzel , T. Czeppe

Knowledge and systematic research on the mechanical properties of amorphous materials in the transition temperature range from amorphous to crystalline is a fundamental scientific interest. Planning the use of these materials must be based on thermomechanical properties information. TiZrCuPd amorphous alloys belong to the potentially lead-free solders of relatively large glass forming ability. The paper presents results of the differential scanning calorimetry, thermomechanical, microstructural and phase analysis of the TiZrCuPd amorphous alloys containing 14 at% Pd and 2 and 3 at% Sn additions at the expenses of Cu content. The samples were investigated in the tensile-load modulated and dilatometric modes in the temperature range of the glass transition and crystallization. The relation between two steps of crystallization process, plastic flow and resulting ability for the deformation was analyzed and related to the microstructure and phase analysis. The determined temperature range of glass transition and primary crystallization show enhanced ductility in the dependence on the Sn additions and homogeneous deformation in this range. The engineering strain of alloys reveals its dependence on the temperature, especially visible in the sample for the 2 at% Sn additive.



中文翻译:

基于钛的非晶态合金在玻璃化转变和结晶温度范围内的热力学行为

对从非晶态到晶体态转变温度范围内的非晶态材料的机械性能的知识和系统研究是一项基本的科学兴趣。计划使用这些材料必须基于热机械性能信息。TiZrCuPd非晶合金属于具有较大玻璃形成能力的潜在无铅焊料。本文介绍了以14%的Pd和2%和3%的Sn含量(以铜含量为代价)对TiZrCuPd非晶态合金进行差示扫描量热法,热机械,微观结构和相分析的结果。在玻璃化转变和结晶的温度范围内,以拉伸载荷调制和膨胀模式研究了样品。结晶过程的两个步骤之间的关系,分析了塑性流动及其产生的变形能力,并与微观结构和相分析有关。所确定的玻璃化转变和初生结晶温度范围显示出增强的延展性,这取决于锡的添加量和该范围内的均匀变形。合金的工程应变揭示了其对温度的依赖性,特别是在2 at%Sn添加剂的样品中可见。

更新日期:2018-11-16
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