Studi pengaruh peningkatan waktu tahan kondisi overheat temperatur1200C terhadap pertambahan panjang cacat struktur mikro dan nilai kekerasan pada material turbine blade nickel base superalloy = Study of effect of increased holding time in overheat 1200 °C condition on defect propagation, microstructure change and hardness number of nickel based superalloy turbine blade (Fakultas Teknik Universitas Indonesia, 2010)