Search results

Influence of weld imperfections on the fatigue behaviour of resistance spot welded advanced high strength steels Michael Rethmeier1, 2 1Fraunhofer Institute for Production Systems and Design Technology (IPK), Berlin, Germany 2BAM Federal Institute for Materials Research and Testing, Berlin, Germany Michael.Rethmeier@bam.de, phone: +49 30 8104-1550 Keywords: Resistance spot welding, gaps, cracks, fatigue life Abstract The use of advanced high strength steels (AHSS) in the automotive body-in-white is increasing.
§ Internal imperfections have no significant influence on the fatigue life References [1] Brauser, s. et al., Deformation behaviour of spot-welded high strength steels for automotive applications, Materials Science and Engineering: A, Volume 527, Issue 26 (2010), pp. 7099-7108 [2] Long, X. and Khanna, S.
H. et al., “An investigation of the effect of the gapvalues between the overlap portions of the spot-welded pieces on fatigue life”, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 222, Number 6, (2008), pp. 881-890 [10] Hahn, O. and Flüggen, F., „Influence of cyclic loading on the mechanical properties of components: Proc DVS-Congress "Spot welding", May 2010, pp. 180-191 [11] Davidson, J.
H., Methods to obtain weld discontinuities in spot-welded joints made of advanced high-strength steels, Welding in the world 55 (2011), No.11/12, pp.99-106 [14] Gaul, H. et al., “Evaluation of fatigue crack propagation in spot welded joints by stiffness measurements”, International Journal of Fatigue, Vol. 33, Issue 5, 2011, pp. 740-745 [15] Ullner, C. et al., “Determination of local stress–strain properties of resistance spot-welded joints of advanced high-strength steels using the instrumented indentation test”, Journal of materials Science, Vol. 47, issue 3 (2012) 1504–1513 [16] Wang, G. and Barkey, M.
E., “Investigating the spot weld fatigue crack growth process using X-ray imaging”, Welding Journal, vol. 85, issue 4 (2006), pp. 84-90 [17] Pan, N. and Sheppard, S.

Derekar, A review of wire arc additive manufacturing and advances in wire arc additive manufacturing of aluminium, Materials Science and Technology . 34 (2018) 895–916
Williams, Thermo-mechanical analysis of Wire and Arc Additive Layer Manufacturing process on large multi-layer parts, Computational Materials Science. 50 (2011) 3315–3322
Colegrove, Wire + Arc additive manufacturing, Materials Science and Technology. 32 (2016) 641–647
Abaturova, Modification of Al-10Si-2Cu alloy surface by intensive pulsed electron beam, Journal of Materials Research and Technology. 9 (2020) 5591–5598
Kosinov, Structural and phase changes under electropulse treatment of fatigue-loaded titanium alloy VT1-0, Journal of Materials Research and Technology. 8 (2019) 1300–1307

Nonlinear Dynamic Analysis Model for RC Shear Wall Pinle Zhang Department of Civil Engineering, Kunming University of Science and Technology, Kunming, China *Correspondence to: Zhang Pin-le, Kunming University of Science and Technology, 650500, P.R.
It is necessarily to investigate hysteretic characteristics of shear spring, axial spring and bending spring with high strength and axial compression ratio, for the strength of materials and axial compression of high-rise building is increasingly increased.
Journal of Structural Division, ASCE, 1970, 96(12): 2557-2572
Journal of Structural Division, ASCE, 1993, 119(3)
Journal of Building Structures, 2004, 25(5):35-42 (in Chinese)

Factors Influencing Bonding Strength of Geopolymer-Aggregate Interfacial Transition Zone Qing Wang1,a , Zhaoyang Ding1,b, Jing Da1,c, Kun Ran1,d and Zhitong Sui2,e 1School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China 2School of Materials & Metallurgy, Northeastern University , Shenyang 110004, China.
Experiment Raw materials.
Results may vary with the raw materials because that the raw materials are not pure crystal .
Journal of Hazardous Materials, 2007, 139, pp. 506–513
Supplementary Cementing Materials for Sustainable Development Inc, Ottawa, Canada (2008)

These devices differ in their mechanical complexity and the materials used for the sliding surfaces [5].
Acknowledgments The financial support by the China Postdoctoral Science Foundation funded project (Number: 20110491739）and National Science and Technology Supporting Item (2009BAJ28B01-3) is greatly appreciated.
Journal of structural and construction engineering.
Journal of structural and construction engineering.
Journal of structural and construction engineering.

Table 1 lists the technology parameters and manufacturing materials of ultraviolet-curing wire saw.
References [1] Q.L.Dai,X.P.Xu,Y.C.Wang: Materials Science & Engineering,Vol.20(2002),pp.465-468
[2] X.F.Liu,Y.Z.Li:International Journal of Refractory Metals & Hard Materials,Vol.21(2003), pp.119-123
[4] Y.Q.Song,Z.J.Kang,Y.Gao: Journal of Synthetic Crystals,Vol.28(1999),pp.404-408
[5] Y.H.Wang,J.B.Zang,M.Z.Wang et al.: Journal of Materials Processing Technology,Vol.129 (2002),pp.369-372

The understanding of reloading stress relaxation behavior of structural materials is required for safety designing and maintenance of steam-powered plants.
The steel 12Cr-1Mo-1W-1/4V is used in steam turbine as a high temperature bolting materials.
A reliable prediction of the long-term behavior of materials in dependence on the stress regime and the temperature is a very complex challenge.
[2] Chiaki Tanaka, Toshio Ohba, Journal of The Society of Materials Science, Vol. 29(1980), pp. 26
Hashem, Advanced Performance Materials, Vol. 6(1999), pp.129.

Thus the experimental results emphasize the importance of travel angle and its role in depositing materials within the weld.
Zhao, The Investigation of Typical Welding Defects for 5456 Aluminum Alloy Friction Stir Welds, Materials Science and Engineering, (2006), 433(1-2), 64-69
Pfefferkorn, Effect of Compliance and Travel Angle on Friction Stir Welding With Gaps, Journal of Manufacturing Science and Engineering, (2010), Vol. 132
Reddy, Influence of Tool Tilt Angle on Material Flow and Defect Generation in Friction Stir Welding of AA2219, (2018), Defense Science Journal, Vol. 68, No. 5, pp. 512-518
Badheka An Experimental Insight on the Selection of the Tool Tilt Angle for Friction Stir Welding of 7075 T651 Aluminum Alloys, Indian Journal of Science and Technology, (2016),Vol 9(S1)

Acknowledgment This work was supported by the Natural Science Foundation of the Anhui Higher Education Institutions of China (No. 
International Journal of Materials Research, 2015, 106(7): 689-696
Materials Characterization, 2017, 127:239-247
Journal of Magnetism and Magnetic Materials, 2017, 430: 59-64
Rare Metal Materials and Engineering, 2017, 46(9): 2366-2370

The pyroclastic flow deposits formed by the eruption in 1000 BP widely distributed to the south of the Guangming Forest and the rockfall deposits in the upstream of the Erdaobai River provide a source for massive solid loose materials.
After volcanic eruption, plants are not developed in the Erdaobai River Basin, eruptive materials are loose thus branch gullies are easily formed, and fall into the Erdaobai River.
Journal of Hydrology, 388, (2010), 399–413 [13] Procter J N, et al.
Journal of Capital Normal University ( Natural Science Edition ), 30(1), (1999), 70-75 (in Chinese) [16] Wan Yuan, et al.
Journ al of Jilin University (Earth Science Edition), 41(5), (2001), 1638-1645 (in Chinese)