Give approx f drop from heat treatment

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Wuchinich data - high power tests

Allow clicking on bigger version of Maropis 15k loss test graph.


Al-Sarraf - 'A Study of Ultrasonic Metal Welding' (thesis, 2013) - Glasgow U.
	"AISI 1030 carbon steel was selected as the horn material due to its high wear resistance, which is desirable for USMW [101]." (p. 52)
	  Ref. 101 -- A. Shoh, "Welding of Thermoplastics by Ultrasound," Ultrasonics,  vol. 14, no. 5, pp. 209-217, 1976. 
	Properties: p. 53
	".. hardened to 55-60 RC by quenching from 1100oC." (p. 54)
	Also discusses tip knurl.
	
http://www.hielscher.com/i4000_p.htm
	Uses stainless steel 1.4301 (304 SS) for sonochemistry probes. See http://www.brownmac.com/products/stainless-steel-plate/Stainless-Steel-304-and-304l.aspx

"Mathieson - 'Nonlinear characterisation of power ultrasonic devices used in bone surgery' (thesis, 2012).pdf":
	References:
		[171] A. Puskar, "Cyclic stress-strain curves and internal friction of steel at ultrasonic frequencies," Ultrasonics, vol. 20, no. 3, pp. 118-122, 1982. (article in my Q 3-ring notebook)
		- Fig shows reduced loss for reduced grain size