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1.Mechanical Problems
2.Factors depending on joints strength
3.The effects of some factors
4. Stress-strain curves and HAZ thickness
5.Conclusions
These are an example of results. It is found that the joints of 1.5mm HAZ thickness does not do the necking compared with 3.0mm HAZ thickness. By the effect of necking in softening area, stress-strain curves of joints are different by HAZ thickness like this.