摘要
控制散射线是提高射线检测成像质量的主要手段之一,本研究通过缪勒法对激光快速成型TC4钛合金和GH4169高温镍基合金经X射线透照时的散射比进行了测量,结果表明：在本研究测量的所用的射线能量范围内,厚度一定的条件下,对于激光快速成型TC4钛合金和GH4169高温镍基合金,当管电压分别在80～180 kV和85～170 kV范围内增加时X射线散射比均减小;当管电压分别超过180 kV和170 kV后,散射比基本保持不变.对于TC4钛合金,在7～40mm厚度范围内,对于GH4169高温镍基合金,在1～14mm厚度范围内,随着材料厚度的增加,散射比均具有增加的趋势;因此,在条件允许的情况下,适当提高管电压有利于减少散射线对成像质量的影响.
Control X-ray scattering is one of the main means to improve image quality of radiographic. The scattering ratios of TCA Ti alloy used by laser rapid prototyping technique and GH4169 superalloy materials irradiated by X-ray were measured through Mueller method. The results shown that, within the range of Xray energy in this paper, as the thickness of material was fixed, the Xray scattering ratio of the TC4 Ti alloy and GH4169 superalloy decreased when the increase of tube voltage in a range from 80 kV to 180 kV and 85 kV to 170 kV ,respectively. The scattering ratio of two alloy materials kept constant when the tube exceeded 180 kV and 170 kV, respectively. Moreover, as the thickness ranged from 7ram to 40 mm and 1 to 14 mm, their scattering ratio are both had increasing trend. Therefore, whenever possible, appropriate increase of tube voltage is benefit to decrease the effect of scattered radiation in image quality.
出处
《南昌航空大学学报（自然科学版）》
CAS
2013年第3期93-97,共5页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
国家自然科学基金(61261031)
江西省测试技术与控制工程研究中心基金(ZX201028002)
关键词
X射线
散射比
X-ray
Scattering ratio
