Microstructure-Oriented Fatigue Assessment of Construction Materials and Joints Using Short-Time Load Increase Procedure
Microstructure-Oriented Fatigue Assessment of Construction Materials and Joints Using Short-Time Load Increase Procedure
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DOI：
10.3139/120.110592
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发表时间：
2014-01-01
影响因子：
2.5
通讯作者：
Walther, Frank
中科院分区：
文献类型：
--
作者：
Walther, Frank
应力-应变-滞后、变形引起的温度变化和基于DC的电阻测量的变化被应用于多步和单步疲劳载荷下的建筑材料和接头的结构-机械过程的详细表征。讨论了连接工艺对奥氏体钢AISI 304、碳纤维增强聚合物（CFRP）和山毛榉木材料的影响，环境介质对镁合金Mg-4Al-2Ba-2Ca（DieMag 422）和Mg-10 Gd-1 Nd的影响，以及制造工艺对钛合金Ti-6Al-4V和木塑复合材料（WPC）的影响。通过光学显微镜和电子显微镜研究了载荷和循环对显微组织的影响，并将其与疲劳性能相关联，以定性和定量的方式对工艺组织性能关系进行了较精确的描述。用于评估连接、环境和制造对疲劳性能的影响的时效性载荷增加程序适用于伴随生产的使用。
Stress-strain-hysteresis, change in deformation-induced temperature and change in DC-based electrical resistance measurements are applied for the detailed characterization of structural-mechanical processes in construction materials and joints under multiple-step and single-step fatigue loading. Results concerning the influence of joining technologies on austenitic steel AISI304, carbon-fiber reinforced polymers (CFRP) and beech wood materials, of environmental media on magnesium alloys Mg-4Al-2Ba-2Ca (DieMag422) and Mg-10Gd-1Nd, and of manufacturing processes on titanium alloy Ti-6Al-4V and wood-plastic composites (WPC) are discussed. The load-and cycle-dependent change in microstructure was investigated by light and electron microscopy and correlated with fatigue properties, to reach a preferably precise description of process structure property relationship in a qualitative and quantitative manner. The time-efficient load increase procedure applied for evaluation of joining, environmental and manufacturing influence on fatigue performance is suitable for production-accompanied usage.