Use of the cast pin tear test to study solidification cracking
Use of the cast pin tear test to study solidification cracking
复制标题
使用铸销撕裂试验研究凝固裂纹
作者：
B. Alexandrov;J. Lippold
铸销撕裂试验（CPTT）最初是由F.C. Hull在20世纪60年代开发的，用于研究奥氏体不锈钢的凝固开裂。在过去的5年里，俄亥俄州立大学的研究人员修改了原来的测试和设备设计，以研究一系列镍基合金和不锈钢的凝固开裂。本文介绍了测试设备的发展、所采用的技术以及几种合金系统的测试结果。结果表明，CPTT近似地再现了由横向应变试验和实际焊接经验确定的凝固开裂行为趋势。采用CPTT和其他凝固开裂试验生成的各种高合金不锈钢和高铬镍基钎料的凝固开裂敏感性排序之间存在很好的相关性。此外，还描述了CPTT在不同材料组合中稀释效应的应用。
The cast pin tear test (CPTT) was originally developed by F.C. Hull in the 1960s to study solidification cracking in austenitic stainless steels. Over a past 5 years, researchers at the Ohio State University have modified the original test and apparatus design to study solidification cracking in a range of Ni-base alloys and stainless steels. This paper describes the development of the test apparatus, the techniques that are used, and results from the testing of several alloy systems. It is shown that the CPTT closely reproduced the trends in solidification cracking behavior determined by the Transvarestraint test and experienced in actual welds. Very good correlation is found between rankings of the solidification cracking susceptibility in various high-alloy stainless steels and high-Cr Ni-base filler metals generated using the CPTT and other solidification cracking tests. In addition, the application of the CPTT to study dilution effects in dissimilar material combinations is described.