Search Results for microhardness

Fig. 11 Principal components of a typical microhardness tester. Source: Ref 1 More

Figure 5-14 (a) Model 300 Tukon microhardness tester with digital readout. (Courtesy of Page-Wilson Corp., Measurement Systems Div.) More

Figure 5-14 (b) Leitz Miniload 2 microhardness tester with digital eyepiece and display. (Courtesy of E. Leitz, Inc.) More

Figure 5-16 Vickers microhardness as a function of test load for five hardened steel test blocks. More

Fig. 7 Factors affecting the microhardness profile of a nitrided steel. The hardness of the compound zone is unaffected by alloy content, while the hardness of the diffusion zone is determined by nitride-forming elements (Al, Cr, Mo, Ti, V, Mn). Δ X is influenced by the type and concentration More

Fig. 5.40 Microhardness profile and optical micrograph showing severe carburization attack on the 316 specimen with the original as-received surface (solid circle data point) after testing at 649 °C (1200 °F) for 5000 h in He-1500 μatm H 2 -450 μatm CO-50 μatm CH 4 -50 μatm H 2 O. Also shown More

Fig. 10.49 Microhardness profile measured using Vickers hardness tester with a 500 g load as a function of the distance from the overlay surface for alloy 625 weld overlay on the waterwall of a supercritical boiler after 1 year of operation when circumferential grooves, as shown in Fig. 10.36 More

Fig. 10.53 Microhardness profile across the overlay from the overlay surface measured using Vickers hardness tester with a 500 g load. Vickers hardness values (HV) are converted to Rockwell C (HRC) values. Data were obtained from two different overlay samples (Series 1 and 2). 1 in. = 25.4 mm More

Fig. 14 Microhardness readings (location in multipass weld indicated by dots) below 240 HV indicating that no martensite structure is present in the 1.07 m (42 in.) X-65 steel pipe More

Fig. 19 Microhardness traverse data in two locations for the Ti-6Al-4V sheet welded using a tantalum shim. Data labeled “2nd” refer to traverse over second pass of weld only. Data labeled “both” indicate traverse across center of weld where two passes overlap (see Fig. 15 ). More

Fig. 5-4 Knoop 1-kg microhardness number as a function of tempering temperature for three tempering times. The effect of tempering temperature and time on the hardness for a 0.2% C steel. (Adapted from R.N. Caron and G. Krauss, Met. Trans ., Vol 3, p 2382 (1972), Ref 5 ) More

Fig. 4 Microhardness traverses for different nitriding process times More

Fig. 6 Microhardness traverses across a nitrided case on 40HM (4140)-grade steel. 1, tempering temperature 550 °C, time 4 h; 2, tempering temperature 550 °C, time 16 h; 3, tempering temperature 620 °C, time 4 h; 4, tempering temperature 620 °C, time 16 h More

Fig. 7 Microhardness traverses across a nitrided case on 38HMJ (Nitralloy 135M)-grade steel. 1, tempering temperature 550 °C, time 4 h; 2, tempering temperature 550 °C, time, 16 h; 3, tempering temperature 620 °C, time 4 h; 4, tempering temperature 620 °C, time 16 h More

Fig. 17.2 Microhardness trace through case of Fig. 17.1 . (See Table 5.3 to convert DPH to R c .) More

Fig. 17.9 Microhardness profile of trace shown in Fig. 17.8 More

Fig. 6.34 A microhardness tester More

Fig. 6.35 A comparison between the (a) Knoop and (b) Vickers microhardness indenters More

Fig. 6.38 A special leveling device mounted on the stage of the microhardness tester. The device is used to level an uneven specimen. More

Fig. 5.8 Microhardness profile for an economizer tube sample; PM, parent metal Distance, μm Microhardness in VPN at 100 g load Weld 209 400 208 600 204 800 205 HAZ 222 1200 228 1400 202 1600 197 1800 183 PM 196 2200 204 2400 191 2600 More