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Inspection Of Titanium Castings Using Ultrasound Phased Array


General description of the application

Some aircrafts structural part such as engine mount and frame are now built with titanium casting. This material is very difficult to inspect because of its large grain structure. The usual inspection methods are X-ray and ultrasounds, however they present some limitations.
The use of ultrasound phased arrays brought a break­through in the inspection of casting by providing a much better detectability than the conventional methods.

Typical inspection requirement
• Finding and characterizing inclusions
• Covering casting part volume completely
• Flexible enough to fit various shapes
• Portable to perform inspections in-service or in-production

Defects detected
• Ceramic shell as small as 0.031 in. (0.787 mm) at a 1-in. (25 mm) depth
• Tungsten carbide as small as 0.031 in. (0.787 mm) at a 1-in. (25 mm) depth

Description of the solution
• Phased array probe steering the beam from -30°to 30°LW
• Merged top and side views
• 10 and 5 MHz linear phased array probe

Description of the inspection system
• FOCUS LT 32:32 or more
• Dynamic Depth Focusing 
• Linear phased array probe
• Manual or automated X-Y scanner

Parts to inspect
• Engine mount
• Frame
• Thickness: 1 (25 mm) to 6 in. (152.4 mm)

Method of inspection
The phased array probe steers the beam continuously between -30°to 30°LW with an angular resolution of 1 degree. It allows the detection of orientated inclusions. Dynamic Depth Focusing is applied to keep the beam focused over the depth range. The probe scans a X-Y surface and data is merged together to create a top-side view of the casting part. Analysis is performed.

Advantages
• Better detectability than X-ray (The smallest defect detected by X-ray is 0.065 in; by UT phased arrays, it is 0.031 in.)
• Versatility
• Fast and easy to use


Detection of ceramic schells. Merged top- and side-views display.


GLIDER scanner


TomoScan FOCUS LT

Olympus IMS

应用所使用的产品
OmniScan X3系列的每台探伤仪都是一款功能齐备的相控阵工具箱。其创新型全聚焦方式(TFM)和高级相控阵(PA)功能助力您充满信心地识别缺陷,其性能强大的软件功能和便捷的工作流程有助于提高您的检测效率。
工业扫查器根据被测表面的情况准确定位探头的能力,大大地提高了检测质量。奥林巴斯为检测人员提供了各种各样的工业扫查器和配件,为检测工作提供了很大的帮助。扫查器有多种配置,除了手动配置和电动配置,还有单轴编码和双轴编码的区别。
轻便的单组Omniscan SX探伤仪装有一个方便用户阅读的8.4英寸(21.3厘米)触摸屏,可提供性价比很高的检测解决方案。OmniScan SX有两种型号:SX PA和SX UT。SX PA是一个16:64PR仪器,它与仅使用UT技术的SX UT一样,配备有一个用于脉冲回波、一发一收或TOFD(衍射时差)检测的常规UT通道。
OmniScan MX2现在不仅可以与带有一个UT通道的相控阵模块(PA2)及一个用于TOFD(衍射时差)检测的双通道常规超声模块(UT2)配套使用,还可以使用一些创新型软件程序。这些软件程序更进一步提高了业已相当成功的OmniScan MX2平台的性能。
GLIDER扫查器是一款用于对平面或稍微弯曲的复合材料表面进行手动检测的双轴编码扫查器。这款由吸盘固定的扫查器非常适合于光栅扫查。这款扫查器使用涡流阵列、涡流、超声和相控阵技术。
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