China is a large manufacturing country and is transforming into a manufacturing powerhouse. To ensure that machines and equipment are lightweight, high performance, fatigue-resistant, and have a long life, it is important to monitor their residual stress levels during design, manufacturing, and use.
There are 2 proven and reliable methods of residual stress measurement, the X-ray method and the blind hole method. The blind hole method is not as widely used as the blind hole method because of the need to drill holes in the measured parts, while the X-ray method is becoming more and more widely used because of its non-destructive, fast and high accuracy.
The X-ray diffraction method is the most technologically mature residual stress test method without destroying the body of the part. The equipment utilizes the diffraction principle of X-rays to measure the aberration of the dot matrix generated when residual stress exists in the metal material, and then calculates the residual stress.It is widely used in major research institutes, universities and enterprises in China.