Transactions of Materials and Heat Treatment

Title：Reliability analysis on non-destructive testing for internal defects of stainless steel sheet formed by laser selective melting

Authors： Liu Chunhua1 Men Zhengxing2 Li Yanli3 Chen Xiaohui1 Zhang Hong4

Unit： 1.Facility Design and Testing Technology Institute China Aerodynamics Research and Development Center 2.Mechanical and Electrical Engineering Department Chengdu Aeronautic Polytechnic 3. Materials Engineering Department Sichuan Engineering Technical College 4.Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province College of Architecture and Environment Sichuan University

KeyWords： laser selective melting 304L stainless steel internal defects non-destructive testing adaptability

ClassificationCode：TG316

year,vol(issue):pagenumber：2023,48(7):212-221

Abstract：

In order to verify the adaptability of different non-destructive testing methods to the detection of internal defects for stainless steel materials formed by selective laser melting（SLM）, the SLM formed stainless steel trapezoidal plate (thickness of 11-20 mm) was tested by X-ray digital radiogrophy (DR), industrial computed tomography (CT) testing, phased array ultrasonic testing (PAUT), and ultrasonic testing (UT), etc. The experimental results show that CT has the highest sensitivity and can detect internal natural pore defects of 15.58 μm, reaching the level of 10 μm. PA and direct contact method UT can detect millimeter-scale area defects. DR is not sensitive to area defects of SLM stainless steel trapezoidal sheet. In addition, the results of the water immersion method UT show that it is relatively limited to improve the sensitivity of UT by increasing the probe frequency, and it is difficult to implement effective detection when the probe frequency exceeds 10 MHz. The metallographic analysis results verify the reliability of CT, PA and UT. There are individual pores with the diameter of Φ20-Φ100 μm and defect cracks in the SLM stainless steel trapezoidal sheet, and there are also dense defects of about 1 mm in the local area.

Funds：

国家自然科学基金面上项目（12272245）；四川省应用基础研究项目（2022NSFSC0324）；四川大学-自贡政府战略合作支持项目 (2019CDZG-4)

作者简介：刘春华（1986-），男，硕士，工程师 E-mail：huagongren001@163.com

Reference：

[1]Sun Q D, Sun J, Guo K, et al. Compressive mechanical properties and energy absorption characteristics of SLM fabricated Ti6Al4V triply periodic minimal surface cellular structures[J]. Mechanics of Materials, 2022, 166:104241.1-104241.14.

[2]Wang J B, Zhou X L, Li J H. Evolution of microstructures and properties of SLMmanufactured Cu15Ni8Sn alloy during heat treatment[J]. Additive Manufacturing, 2021，37:101599.

[3]Gunasekaran J, Sevvel P, John Solomon I. Metallic materials fabrication by selective laser melting: A review[J]. Materials Today: Proceedings, 2021, 37:252-256.

[4]辛艳喜, 蔡高参, 胡彪, 等. 3D打印主要成形工艺及其应用进展[J]. 精密成形工程, 2021, 13(6): 156-164.

Xin Y X, Cai G S, Hu B, et al. Recent development of main process types of 3D printing technology and application[J]. Journal of Netshape Forming Engineering, 2021,13(6):156-164.

[5]Martin J, Yahata B, Hundley J, et al. 3D printing of highstrength aluminium alloys[J]. Nature, 2017, 549: 365-369.

[6]白晶斐, 马亚鑫, 陈晓辉, 等. 激光选区熔化成形18Ni300工艺参数优化及组织性能分析[J]. 精密成形工程, 2022, 14(4): 162-168.

Bai J F, Ma Y X, Chen X H, et al. Optimization of process parameters and analysis of microstructure and properties of 18Ni300 by laser selective melting[J]. Journal of Netshape Forming Engineering, 2022, 14(4): 162-168.

[7]李艳丽, 魏继业, 马亚鑫, 等. 扫描速度对激光选区熔化成形304L不锈钢板材高温持久性能的影响[J].精密成形工程, 2022, 14(9): 111-118.

Li Y L, Wei J Y, Ma Y X, et al. Effect of scanning speed on high temperature durability performance of 304L stainless steel by selective laser melting[J]. Journal of Netshape Forming Engineering, 2022, 14(9):111-118.

[8]胡平, 艾琳, 邱梓妍, 等. 金属增材制造构件的激光超声无损检测研究进展[J]. 中国激光, 2022, 49(14): 297-308.

Hu P, Ai L, Qu Z Y, et al. Laser ultrasonic nondestructive testing on metal additive manufacturing components[J]. Chinese Journal of Lasers, 2022, 49(14): 297-308.

[9]彭乐, 郑志军. 激光选区熔化成形金属件的缺陷类型及表征方法概述[J]. 材料导报, 2023, 37(8): 21050053.

Peng Y, Zhen Z J. Review of the categories and characterization methods of defects in alloy prepared by selective laser melting[J]. Materials Reports, 2023, 37(8): 21050053.

[10]郭伟玲, 李恩重, 邢志国. 工业CT成像技术在再制造界面典型缺陷研究中的应用与展望[J]. 无损检测, 2021, 43(4): 82-88.

Guo W L, Li E Z, Xing Z G. Application and prospect of industrial CT imaging technology in remanufacturing interface typical defects research[J]. Nondestructive Testing, 2021, 43(4): 82-88.

[11]Gong H J, Nadimpalli V K, Rafi K, et al. MicroCT evaluation of defects in Ti6Al4V parts fabricated by metal additive manufacturing[J]. Technologies, 2019, 7(2): 44-44.

[12]Bi Z, Li Y T, Qian B. Erratum to: Defect formation mechanisms in selective laser melting: A review[J]. Chinese Journal of Mechanical Engineering, 2017, 30(6):1476-1476.

[13]Xue Z Y. Experiment and simulation of fatigue crack growth of SLM nickel base superalloy with different stress ratios and building directions[J]. IOP Conference Series: Materials Science and Engineering, 2019,490(3).

[14]阮雪茜, 林鑫, 黄春平, 等. TC4激光立体成形显微组织对超声参量的影响[J]. 中国激光, 2015,42(1):138-142.

Ruan X Q, Lin X, Huang C P, et al. Effect of microstructure of laser solid forming TC4 titanium alloy on ultrasonic parameters[J]. Chinese Journal of Lasers, 2015,42(1):138-142.

[15]胡婷萍, 高丽敏, 杨海楠. 航空航天用增材制造金属结构件的无损检测研究进展[J]. 航空制造技术, 2019, 62(8): 70-75,87.

Hu T P, Gao L M, Yang H N. Application of nondestructive testing techniques on additive manufacturing in aerospace fields[J]. Aeronautical Manufacturing Technology, 2019, 62(8): 70-75,87.

[16]张祥林,姜迎春,张祥春, 等.激光选区熔化增材制造构件工业CT检测方法研究[J].无损探伤,2020,44(3):34-36.

Zhang X L, Jiang Y C, Zhang X C, et al. Research on industrial ct inspection method of laser selective melting additive manufacturing components[J]. Nondestructive Testing Technology, 2020,44(3):34-36.

[17]杨薇, 王栋, 张强虎, 等. 燃油喷嘴激光选区熔化成型的内部缺陷控制与检测方法研究[J]. 热加工工艺, 2021, 50(6): 54-58.

Yang W, Wang D, Zhang Q H, et al. Study on internal defects control and detection method of selective laser melting of fuel nozzle[J]. Hot Working Technology, 2021, 50(6): 54-58.

[18]张吴双. 激光增材制造金属构件内部缺陷控制与无损检测特性研究[J]. 铸造技术, 2021, 42(5): 346-349.

Zhang W S. Study on Internal defect control and nondestructive testing characteristics of metal components formed by laser additive manufacturing[J]. Foundry Technology, 2021, 42(5): 346-349.

[19]帅三三, 刘伟, 王江, 等. 无损检测在增材制造技术中的应用研究进展[J]. 科技导报, 2020, 38(2): 26-34.

Shuai S S, Liu L, Wang J, et al. Application of nondestructive testing in additive manufacturing technique[J]. Science & Technology Review, 2020, 38(2): 26-34.

[20]李文涛, 周正干. 激光增材制造钛合金构件的阵列超声检测方法研究[J]. 机械工程学报, 2020, 56(8): 141-147.

Li W T, Zhou Z G. Research on ultrasonic array testing methods of laser additivemanufacturing titanium alloy[J]. Journal of Mechanical Engineering, 2020, 56(8): 141-147.

[21]NB/T 47013.5—2015，承压设备无损检测第5部分:渗透检测[S].

NB/T 47013.5—2015，Nondestructive testing of pressure equipments—Part 5:Penetrant testing[S].

[22]NB/T 47013.5-2015，承压设备无损检测第11部分：X射线数字成像检测[S].

NB/T 47013.5-2015，Nondestructive testing of pressure equipments—Part 11: Digital radiography [S].

[23]GB/T 29070—2012，无损检测工业计算机层析成像（CT）检测通用要求[S].

GB/T 29070—2012，Nondestructive testing—Industrial computed tomography (CT) testing—General requirements[S].

[24]NB/T 47013.15—2021，承压设备无损检测第15部分：相控阵超声检测[S].

NB/T 47013.15—2021，Nondestructive testing of pressure equipments—Part 15: Phasedarray ultrasonic testing[S].

[25]NB/T 47013.3—2015，承压设备无损检测第3部分：超声检测[S].

NB/T 47013.5—2015，Nondestructive testing of pressure equipments—Part 3: Ultrasonic testing[S].

[26]GJB 1580A—2004，变形金属超声检测方法[S].

GJB 1580A—2004，Ultrasonic inspection of wrought metal[S].

[27]GB/T 226—2015，钢的低倍组织及缺陷酸蚀检验法[S].

GB/T 226—2015，Test method for macrostructure and defect of steel by etching[S].

Service：

【This site has not yet opened Download Service】【Add Favorite】