Residual Stress and Stress Corrosion of Alloy Materials in Laser Additive Manufacturing

Xingshou Zhang; Qinying Wang; Huaibei Zheng; Tingyao Liu; Lijin Dong; Yuchen Xi; Jin Zhang; Shulin Bai

doi:10.3788/LOP202259.1300002

Journals >Laser & Optoelectronics Progress >Volume 59 >Issue 13 >Page 1300002 > Article

Laser & Optoelectronics Progress
Vol. 59, Issue 13, 1300002 (2022)

Residual Stress and Stress Corrosion of Alloy Materials in Laser Additive Manufacturing

Xingshou Zhang¹, Qinying Wang^1、*, Huaibei Zheng^2、4, Tingyao Liu⁴, Lijin Dong¹, Yuchen Xi¹, Jin Zhang¹, and Shulin Bai³

Author Affiliations

¹School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, Sichuan , China

²State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, Liaoning , China

³College of Engineering, Peking University, Beijing 100871, China

⁴Chengdu Advanced Metal Materials Industry Technology Research Institute Corporation, Chengdu 610303, Sichuan , China

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DOI: 10.3788/LOP202259.1300002 Cite this Article Set citation alerts

Xingshou Zhang, Qinying Wang, Huaibei Zheng, Tingyao Liu, Lijin Dong, Yuchen Xi, Jin Zhang, Shulin Bai. Residual Stress and Stress Corrosion of Alloy Materials in Laser Additive Manufacturing[J]. Laser & Optoelectronics Progress, 2022, 59(13): 1300002 Copy Citation Text

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Fig. 1. Stress and strain system in coating^［31］

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Fig. 2. Mechanism of the theory of film breaking^[67]

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Method	Technology	Advantage	Disadvantage
Mechanical method	Drilling method	Simple principle，cheap equipment，easy to operate	Damage to the material，measurement accuracy is not high
Mechanical method	Nanoindentation method	High resolution，make the material deform in a very small range without destroying the structural integrity of the material，high measurement efficiency	Measurement result is not unique，the measurement accuracy is not high
Physical method	X-ray diffraction method	The measurement result is more accurate，the material is not damaged，the strain field distribution on the surface of the material can be measured	Can only measure near-surface information，testing instruments are expensive
Physical method	Neutron diffraction method	Large penetration depth，three-dimensional stress field distribution can be obtained	Experimental equipment is expensive

Table 1. Comparison of residual stress testing methods

Method	Scope of application
Preheating	Suitable for key components of high-value and high-precision equipment，not suitable for industrialized mass-produced products
Ultrasonic shock or vibration	Suitable for improving small size and relatively large size components
Laser process control	Suitable for laser additive manufacturing of workpieces and laser cladding layers

Table 2. Main method of laser cladding layer to improve residual stress

Method	Evaluation index	Advantage	Disadvantage	Applicability
Constant load method	Time to break，percentage of breaking elongation	Initial stress determination，simple test method，no restriction on sample type and size	Unable to obtain crack growth information	Cladding layer，bulk material
Constant displacement method	Time to break	Device is simple and easy to implement，and can obtain crack growth parameters	Unclear stress state，long test period	Cladding layer，bulk material
Slow strain rate method	Time to break，percentage of breaking elongation，section shrinkage	Short test period，high sensitivity to stress corrosion cracking	Complex equipment and strain rate have a significant impact on the results	Cladding layer，bulk material

Table 3. Comparison of stress corrosion testing methods

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