Residual Stress Reduction of 7050 Large-Scale Aluminum Alloy Forging Based on Segmented Cold-Pressing Method

YAO Shijie; XIA Weijun; YUAN Wuhua; CUI Mingliang

doi:10.11973/jxgccl201801017

Materials and Mechanical Engineering > 2018 > 42(1): 84-88. > DOI: 10.11973/jxgccl201801017

YAO Shijie, XIA Weijun, YUAN Wuhua, CUI Mingliang. Residual Stress Reduction of 7050 Large-Scale Aluminum Alloy Forging Based on Segmented Cold-Pressing Method[J]. Materials and Mechanical Engineering, 2018, 42(1): 84-88. DOI: 10.11973/jxgccl201801017

Citation:

PDF (5762 KB)

Residual Stress Reduction of 7050 Large-Scale Aluminum Alloy Forging Based on Segmented Cold-Pressing Method

1. College of Materials Science and Engineering, Hunan University, Changsha 410082, China;
2. Wanhang Die Forging Company, China National Erzhong Group Co., Deyang 618013, China

More Information

Received Date: January 12, 2017
Revised Date: December 10, 2017

Graphical Abstract

Abstract

Abstract

The quenching-induced residual stress of 7050 large-scale aluminum alloy forging was reduced by segmented cold-pressing method. The value and distribution of the residual stress of the forging before and after segmented cold-pressing were simulated by Deform-3D finite element software, and the residual stress of the forging was tested by the blind hole method. The results show that the residual stress of the forging was effectively reduced after segmented cold-processing. The residual stresses measured were less than 130 MPa and the 70.3%-97.4% reduction was achieved. The reduction range of residual stresses in the non-lap zone was bigger than that in the lap zone. The simulation results agreed with the test results.
- 7050 aluminum alloy,
- blind hole method,
- residual stress,
- segmented cold-pressing

FullText(HTML)

References (11)

References

[1]	刘兵,彭群超,王日初,等. 大飞机用铝合金的研究现状及展望[J].中国有色金属学报,2010,20(9):1705-1714.
[2]	任建平,宋仁国,陈小明,等. 7XXX系铝合金热处理工艺的研究现状及进展[J].热加工工艺,2009,38(6):119-124.
[3]	MEI Z Y, GAO H, WANG Q Q. Analyzing and controlling distortion of aircraft aluminium alloy structural part in NC machining[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(2):146-150.
[4]	CERUTTIL X, ARSENE S, MOCELLIN K. Prediction of machining quality due to the initial residual stress redistribution of aerospace structural parts made of low-density aluminum alloy rolled plates[J]. International Journal of Material Forming,2016, 9:677-690.
[5]	杨久强. 高强度变形铝合金残余应力的消减[J]. 锻压技术,1995(2):22-32.
[6]	TANNER D A, ROBINSON J S. Reducing residual stress in 2014 aluminium alloy die forging[J]. Materials and Design, 2009, 29(7):1489-1496.
[7]	ROBINSON J S, HOSSAIN S, TRUMAN C E, et al. Residual stress in 7449 aluminium alloy forgings[J]. Materials Science and Engineering A, 2010, 527(10):2603-2612.
[8]	任武,李益华,吴运新,等. 列车车轴表层和内部淬火残余应力的有限元模拟[J].机械工程材料,2014,38(10):101-104.
[9]	KOC M, CULP J, ALTAN T. Prediction of residual stresses in quenched aluminum blocks and their reduction though cold working processes[J]. Journal of Materials Processing Technology, 2006, 174(1/2/3):342-354.
[10]	廖凯.铝合金厚板淬火-预拉伸内应力形成机理及测试方法研究[D].长沙:中南大学,2010.
[11]	ROBINSON J S, TANNER D A, TRUMAN C E,et al. The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075[J]. Materials Characterization, 2012, 65(3):73-85.

Cited By

Get Citation

PDF

XML

Article views (3) PDF downloads (0)

Turn off MathJax

Article Contents

Abstract

References

Residual Stress Reduction of 7050 Large-Scale Aluminum Alloy Forging Based on Segmented Cold-Pressing Method

Abstract

References

Catalog

Export File

Citation

Format

Content