Development of in situ manufacturing and mechanical evaluation system for micromaterials

微材料原位制造及力学评价系统开发

基本信息

批准号：
11355007
负责人：
KOMAI Kenjiro
金额：
$ 17.15万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

In order to develop a reliable micromachine in a service operation, much care must be taken to micro mechanical evaluation, i.e., mechanical properties of μm-sized microelements including fatigue behavior. However, the evaluation method has not been well established yet. In this study, the evaluation system of metallic foil is developed, including in situ specimen machining, chucking and non-contact strain measurement. Using an electric discharge machine (PX-05 : Mitsubishi Co.Ltd.), micro specimens of stainless steel foil were machined and a suitable machining condition was found to minimize the roughness of machined surface : the minimum of the maximum roughness was 1.0μm. The micro specimen for tensile testing was designed to make easily handle and testing, which has the specimen supporting part and the specimen chucking part. To measure the strain of microelements, for which strain gages on the market are too large and strong, a laser speckle strain measurement method was applied, and non-contact strain measurement system for microelements was developed. Integrating these machining system and non-contact strain measurement system, tensile and fatigue tests of micro specimens of stainless steel foil (thickness : 50 μm, width : 1 mm) was successfully conducted, and the influence of anisotropy and machining method on the mechanical and fatigue strength was investigated. The elongation at break and fracture morphology of tensile tests were affected by specimen orientation, but fatigue strength was not.

为了在维修操作中开发可靠的微型机械，必须非常小心地进行微型机械评估，即μM大小的微元素（包括疲劳行为）的机械性能。但是，评估方法尚未确定。在这项研究中，开发了金属箔的评估系统，包括原位标本机，chuck和非接触式应变测量。使用电动机（PX-05：三菱Co.ltd。），对不锈钢箔的微型标本进行了加工，发现合适的加工条件可最大程度地减少加工表面的粗糙度：最大粗糙度的最小值为1.0μm。拉伸测试的微型标本旨在使其轻松处理和测试，该标本具有支撑零件和样品碎屑的样品。为了测量微元素的应变，对于市场上的应变量量太大且强大，应用了激光样品应变测量方法，并开发了用于微元素的非接触式应变测量系统。成功地进行了这些加工系统和非接触型应变测量系统，不锈钢箔（厚度：50μm，宽度：1 mm）的微植物的拉伸和疲劳测试，并研究了各向异性和加工方法对机械和疲劳强度的影响。拉伸试验的断裂和断裂形态的伸长受到样品方向的影响，但疲劳强度却没有。