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Effect of pre-rolling temperature on the interfacial properties and formability of steel-steel bilayer sheet in Single Point Incremental Forming
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture ( IF 2.6 ) Pub Date : 2020-10-14 , DOI: 10.1177/0954405420963004
Malik Hassan 1 , Ghulam Hussain 1 , Aaqib Ali 1 , Muhammad Ilyas 1 , Sohail Malik 1 , Wasim A Khan 1 , Burak Bal 2
Affiliation  

The aim of this research was to investigate the effect of pre-rolling temperature on the interfacial properties in delamination modes 1 and 2; and formability in Single Point Incremental Forming (SPIF) of Steel-Steel (St-St) bilayer sheet prepared by roll bonding process. The roll bonding process was performed at three pre-rolling temperatures, 700°C, 800°C, and 950°C, with a constant thickness reduction ratio of 58%. The bond strength and critical strain energy release rate (CSERR) were measured to characterize the interface of St-St bilayer sheet. T-peel test for mode 1 and tensile shear test for mode 2 were conducted to determine the interfacial properties. The formability of St-St bilayer sheet in SPIF was measured in terms of maximum wall angle. The results showed that the increase in pre-rolling temperature from 700°C to 950°C enhanced the bond strength and CSERR, in both mode 1 and 2. The enhancement in bond strength with an increase in pre-rolling temperature was 149.5% and 203% in mode 1 and 2, respectively. However, the increase in CSERR in mode 1 and 2 was 115% and 367%, respectively. The formability of St-St bilayer sheet also showed an increasing trend with an increase in pre-rolling temperature. Moreover, a consistent relation between formability and interfacial parameters was observed. It was also found that to successively deform the bilayer sheet into the desired shape, it is necessary for the sheet to be heated above the critical temperature during fabrication to facilitate good bonding between two sheets.

中文翻译:

单点增量成形预轧温度对钢-钢双层板界面性能和成形性的影响

本研究的目的是研究预轧温度对分层模式 1 和 2 中界面特性的影响;通过滚压粘合工艺制备的钢-钢 (St-St) 双层板的单点增量成型 (SPIF) 和可成型性。滚压工艺在 700°C、800°C 和 950°C 三个预轧温度下进行,厚度压下率为 58%。测量结合强度和临界应变能释放率 (CSERR) 以表征 St-St 双层片的界面。进行模式 1 的 T 剥离试验和模式 2 的拉伸剪切试验以确定界面性质。根据最大壁角测量 SPIF 中 St-St 双层板的可成形性。结果表明,在模式 1 和模式 2 中,预轧温度从 700°C 增加到 950°C 提高了结合强度和 CSERR。随着预轧温度的升高,结合强度的提高为 149.5% 和模式 1 和模式 2 分别为 203%。然而,模式 1 和模式 2 中 CSERR 的增加分别为 115% 和 367%。St-St双层板的成型性也随着预轧温度的升高而呈现增加的趋势。此外,观察到可成形性和界面参数之间的一致关系。还发现为了使双层片连续变形为所需形状,在制造过程中必须将片加热到临界温度以上以促进两片之间的良好结合。在模式 1 和模式 2 中,随着预轧温度的增加,结合强度的提高分别为 149.5% 和 203%。然而,模式 1 和模式 2 中 CSERR 的增加分别为 115% 和 367%。St-St双层板的成型性也随着预轧温度的升高而呈现增加的趋势。此外,观察到可成形性和界面参数之间的一致关系。还发现为了使双层片连续变形为所需形状,在制造过程中必须将片加热到临界温度以上以促进两片之间的良好结合。在模式 1 和模式 2 中,随着预轧温度的增加,结合强度的提高分别为 149.5% 和 203%。然而,模式 1 和模式 2 中 CSERR 的增加分别为 115% 和 367%。St-St双层板的成型性也随着预轧温度的升高而呈现增加的趋势。此外,观察到可成形性和界面参数之间的一致关系。还发现为了使双层片连续变形为所需形状,在制造过程中必须将片加热到临界温度以上以促进两片之间的良好结合。St-St双层板的成型性也随着预轧温度的升高而呈现增加的趋势。此外,观察到可成形性和界面参数之间的一致关系。还发现为了使双层片连续变形为所需形状,在制造过程中必须将片加热到临界温度以上以促进两片之间的良好结合。St-St双层板的成型性也随着预轧温度的升高而呈现增加的趋势。此外,观察到可成形性和界面参数之间的一致关系。还发现为了使双层片连续变形为所需形状,在制造过程中必须将片加热到临界温度以上以促进两片之间的良好结合。
更新日期:2020-10-14
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