Microstructure and Mechanical Properties of the Butt Joint in High Density Polyethylene Pipe

Figure 8

(a) Optical image of the W-PE70 weld seam after etching by chromium trioxide based etchant. SEM images of W-PE70 at different magnifications and different locations of weld zone (b, c, d, e). Scale bar is 500 μm (b), 100 μm (c), 200 μm (d), and 10 μm (e).

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