Great looking blades. A couple ways to reveal damascus and hamons is to shield the blade with a small long piece of black matt board. The blade is being over exposed by your camera meter. The black board cuts some of the light on your blade to cause an underexposure which will show the detail. I see you are using a flash for your photos. If you use natural or studio lights, with your camera on a tripod, you can use the black board trick.
Another technique is to try to underexpose the image. There is typically a +/- button on your camera. Dial it down one click and take a shot, dial down another click and take a shot, etc.