Characterization of alloy-based material properties using Type-II Fiber-Bragg-Grating and Neutron-Diffraction

热撕裂是一个关键的质量标准，这可能导致铝铸造部件的拒绝。避免这些是设计过程的重要组成部分。热泪产生的机制是复杂的，因为它受到几个参数的影响。这些参数包括铸造系统的设计、几何形状和铝合金的成分。有几种方法来调查热泪。它们可分为原位法和非原位法。虽然非原位过程要么是破坏性的，要么不能提供足够的信息，但原位过程是复杂的，不能提供关于热撕裂形成的足够信息。出于这个原因，金属成形和铸造主席将使用光纤应变传感器对热撕裂的形成进行现场调查。在本研究项目中，将使用光纤布拉格光栅记录热撕裂过程中的应变速率，并确定铝合金对热撕裂的影响。所获得的知识将用作热裂数值预测的模型，从而提高铸件质量。

Hot tears are a critical quality criterion, that can lead to the rejection of aluminum cast components. Avoiding these is an important part of the design process. The mechanisms, which lead to hot tears are complex, since they are influenced by several parameters. These parameters include the design of the cast system, the geometry, and the composition of the aluminium alloy.There are several methods to investigate hot tears. They can be divided into in-situ and ex-situ methods. While ex-situ processes either work destructively or cannot provide sufficient information, the in-situ processes are complex and do not give enough information about the formation of hot tears.For this reason, the Chair of Metal Forming and Casting will conduct an in-situ investigation into the formation of hot tears using optical fiber strain sensors. In this research project, the strain rates during hot tearing will be recorded using Fiber-Bragg-Gratings and the influence of aluminum alloys on hot tears will be determined. The knowledge gained will be used as a model for the numerical prediction of hot tears and thus lead to an increase of the cast quality.