作者：高天胤1, 高怡斐1,2, 牛瞳2
作者单位：1. 钢铁研究总院，北京 100081;
2. 钢研纳克检测技术股份有限公司，北京 100081
关键词：3D打印;孔挤压试验;数学关系;失效模式
摘要：
孔挤压试验是通过模拟螺栓、销钉、铆钉与构件结合时的受力情况，针对检测构件部分承受的载荷而提出的一种试验方法。该文通过试验对3D打印钛合金TC4的孔挤压试验特性进行研究和分析，并采用对比试验的形式，研究3D打印钛合金孔挤压试验中试样厚度、孔径、孔边距及边距比对试验结果的影响。通过对实验数据的分析整理，建立数学关系式，明确试样厚度、孔边距、孔径以及孔挤压最大载荷4个参数之间的关系。分析试样的失效形式，描述孔挤压试验可能造成的3种裂纹形式，并对这3种裂纹的形成原因进行分析和研究。
Analysis of pin-type bearing test of 3D printed titanium alloy
GAO Tianyin1, GAO Yifei1,2, NIU Tong2
1. Central Iron & Steel Research Institute, Beijing 100081, China;
2. NCS Testing Technology Stock Co., Ltd., Beijing 100081, China
Abstract: Pin-type bearing test was a kind of test method for the load of component parts by simulating the stress condition when bolt, pin, rivet and component were assembled. The test of pin-type bearing test characteristics of 3D printing TC4 titanium alloy was carried out research and analysis. Contrast tests were used to study the 3D printing titanium alloy pin-type bearing test through specimen thickness, diameter and distance and edge distance in the test results. By analyzing and sorting out the experimental data, the mathematical relation was established, and the relations among the four parameters of sample thickness, edge distance, hole diameter and maximum load of pin-type bearing were clarified. The failure modes of the pin-type bearing test were analyzed. Three types of cracks which might be caused by pin-type bearing test were described, and the causes of the three types of cracks were analyzed and studied.
Keywords: 3D printing;pin-type bearing test;mathematical relation;failure mode
2021, 47(2):56-62 收稿日期: 2019-05-21;收到修改稿日期: 2019-07-15
基金项目: 北京市科技计划课题（Z171100000817001）
作者简介: 高天胤(1989-),男,辽宁鞍山市人,硕士,研究方向为孔挤压试验方法
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