PSI - Issue 59

Teguh Muttaqie et al. / Procedia Structural Integrity 59 (2024) 222–229 Muttaqie et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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However, a downward trend was observed in the impact energy of I-160-1, I-160-2, and I-160-3 specimens, which was directly proportional to the decrease in temperature of the specimens during testing. Figure 3 shows the condition of the test specimens after rupture. 5.2. Comparisons with published test data Figure 4 shows the published test data of impact energy on cryogenic temperature from SUS 304. It is shown that any impact tested of SUS 304 on cryogenic temperature recorded with the large spreading value from the previously published test data.

Fig. 4. Impact energy on cryogenic temperature combined from SUS 304 published test data.

(a) Upper bound prediction

(b) Lower bound prediction

Fig. 5. Impact energy on SUS 304 measured from the highest and lowest value from published data.

Variations in impact energy results are influenced by the accuracy of specimen size and V-notch dimension fabrication. The Charpy impact test results are affected by these parameters, as evidenced by the varying results collected from published test data. The difference in values was measured by grouping upper and lower limits, with all test results falling in between. The mean of the data trend line indicates a downtrend impact energy directly proportional to the decrease in the temperature record, as experienced in specimens I-60-2, I-60-3, and I-160-2. On the other hand, Figure 5 shows the highest and lowest value of impact energy on cryogenic temperature from SUS 304 published data. The test data from the current study contributed to the upper bound data, with I-160-1, I-160-2, and I-160-3 specimens still within the range close to the trend line drawn.